Runestone Issue: Sage interactive cell "Evaluate R" throws "Unprocessable Request"

[iambethchance]

Please check the current issues
--> I searched current issues for "unprocessable" but did not find any hits.

What Page were you on
https://author.runestone.academy/ns/books/published/calpoly_iscam_winter25/investigation1-2.html

Platforms
Initially we thought this was an iOS / Safari issue, but later we found that we get this error on iOS/Safari, and on Windows 11 / Chrome.

Describe the bug
To replicate:

1. Scroll down to "Technology Detour – Calculating Binomial Probabilities. 18. Calculate Binomial Probabilities with Technology. "
2. Click on this link to expand content "Hint 1. Calculating Binomial Probabilities in R"

3. Scroll down to "Evaluate R" and click on this button.

I get this error:

A Screenshot is worth a thousand words
See above screenshots.

Javascript Errors
Here is what I see in console when this occurs:

Here is the console:
tex-chtml.js:1 No version information available for component [tex]/newcommand
(anonymous) @ tex-chtml.js:1
Promise.then
c @ tex-chtml.js:1
t.load @ tex-chtml.js:1
(anonymous) @ tex-chtml.js:1
(anonymous) @ tex-chtml.js:1
(anonymous) @ tex-chtml.js:1
pretext_add_on.js?x=1:23 minivers 0
user_preferences.js:310 adding tab listener
tex-chtml.js:1 No version information available for component [pretext]/mathjaxknowl3.js
(anonymous) @ tex-chtml.js:1
Promise.then
c @ tex-chtml.js:1
t.load @ tex-chtml.js:1
(anonymous) @ tex-chtml.js:1
(anonymous) @ tex-chtml.js:1
(anonymous) @ tex-chtml.js:1
console.js:19 sagecell.makeSagecell called
console.js:19 sagecell.makeSagecell finished
investigation1-2.html:90 in ready function
ethicalads.min.js:1 No ad placements found.
warn @ ethicalads.min.js:1
w @ ethicalads.min.js:1
(anonymous) @ ethicalads.min.js:1
Promise.then
(anonymous) @ ethicalads.min.js:1
(anonymous) @ ethicalads.min.js:1
a @ ethicalads.min.js:1
(anonymous) @ ethicalads.min.js:1
(anonymous) @ ethicalads.min.js:1
bookfuncs.js:276 Timezone cookie matches, not sending timezone to server
bookfuncs.js:304 This page served by undefined
OneProp.htm?hideExtras=1:3731 Blocked autofocusing on a element in a cross-origin subframe.
bookfuncs.js:368 triggering runestone:pre-login-complete
webpack.index.js:208 Runestone pre-login complete
webpack.index.js:189 Loading Runestone component: shortanswer
webpack.index.js:189 Loading Runestone component: multiplechoice
webpack.index.js:189 Loading Runestone component: answer
webpack.index.js:189 Loading Runestone component: feedback
webpack.index.js:189 Loading Runestone component: dragndrop
webpack.index.js:189 Loading Runestone component: fillintheblank
fitb.js:742 Assertion failed: Error rendering Fill in the Blank Problem __I1.2b.6
Details: SyntaxError: Unexpected end of JSON input
(anonymous) @ fitb.js:742
each @ jquery.min.js:2
each @ jquery.min.js:2
(anonymous) @ fitb.js:731
dispatch @ jquery.min.js:2
y.handle @ jquery.min.js:2
(anonymous) @ webpack.index.js:202
Promise.then
m @ webpack.index.js:200
l @ jquery.min.js:2
c @ jquery.min.js:2
setTimeout
(anonymous) @ jquery.min.js:2
u @ jquery.min.js:2
fireWith @ jquery.min.js:2
fire @ jquery.min.js:2
u @ jquery.min.js:2
fireWith @ jquery.min.js:2
ready @ jquery.min.js:2
_ @ jquery.min.js:2
fitb.js:742 Assertion failed: Error rendering Fill in the Blank Problem __tech-detour-binomial-1-2b
Details: SyntaxError: Unexpected end of JSON input
(anonymous) @ fitb.js:742
each @ jquery.min.js:2
each @ jquery.min.js:2
(anonymous) @ fitb.js:731
dispatch @ jquery.min.js:2
y.handle @ jquery.min.js:2
(anonymous) @ webpack.index.js:202
Promise.then
m @ webpack.index.js:200
l @ jquery.min.js:2
c @ jquery.min.js:2
setTimeout
(anonymous) @ jquery.min.js:2
u @ jquery.min.js:2
fireWith @ jquery.min.js:2
fire @ jquery.min.js:2
u @ jquery.min.js:2
fireWith @ jquery.min.js:2
ready @ jquery.min.js:2
_ @ jquery.min.js:2
fitb.js:742 Assertion failed: Error rendering Fill in the Blank Problem __PP1.2bA.2
Details: SyntaxError: Unexpected end of JSON input
(anonymous) @ fitb.js:742
each @ jquery.min.js:2
each @ jquery.min.js:2
(anonymous) @ fitb.js:731
dispatch @ jquery.min.js:2
y.handle @ jquery.min.js:2
(anonymous) @ webpack.index.js:202
Promise.then
m @ webpack.index.js:200
l @ jquery.min.js:2
c @ jquery.min.js:2
setTimeout
(anonymous) @ jquery.min.js:2
u @ jquery.min.js:2
fireWith @ jquery.min.js:2
fire @ jquery.min.js:2
u @ jquery.min.js:2
fireWith @ jquery.min.js:2
ready @ jquery.min.js:2
_ @ jquery.min.js:2
dragndrop.js:70 Populating DragNDrop with premises and responses
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for __I1.2b.1 undefined
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for __I1.2b.2 undefined
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for __I1.2b.5 undefined
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for __I1.2b.7 undefined
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for __I1.2b.13 undefined
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for __I1.2b.15 undefined
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for __I1.2b.16 undefined
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for __PP1.2bA.1 undefined
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for __PP1.2bA.3 undefined
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for __PP1.2bA.4 undefined
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for __PP1.2bB.1 undefined
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for __PP1.2bB.2 undefined
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for __PP1.2bB.3 undefined
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for __PP1.2bB.4 undefined
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for __PP1.2bB.5 undefined
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for __I1.2b.2b undefined
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for __I1.2b.3 undefined
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for __I1.2b.9 undefined
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for undefined
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for undefined
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for undefined
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for undefined
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for undefined
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for __I1.2b.4 undefined
main.js:1 {uYln4: 'g'}
runestonebase.js:387 Response from server: 200
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
runestonebase.js:399 resolving checkServer with server data
pretext_add_on.js?x=1:199 adding video popouts
pretext_add_on.js?x=1:326 scrollWidth 23
pretext_add_on.js?x=1:540 Source file unavailable: editing not possible
pretext.js:44 setting up pretext
runestonebase.js:387 Response from server: 200
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
runestonebase.js:399 resolving checkServer with server data
runestonebase.js:387 Response from server: 200
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
runestonebase.js:399 resolving checkServer with server data
runestonebase.js:387 Response from server: 200
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
runestonebase.js:399 resolving checkServer with server data
runestonebase.js:387 Response from server: 200
runestonebase.js:387 Response from server: 200
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
runestonebase.js:399 resolving checkServer with server data
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
runestonebase.js:399 resolving checkServer with server data
runestonebase.js:387 Response from server: 200
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
runestonebase.js:399 resolving checkServer with server data
runestonebase.js:387 Response from server: 200
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
runestonebase.js:399 resolving checkServer with server data
runestonebase.js:387 Response from server: 200
runestonebase.js:387 Response from server: 200
runestonebase.js:387 Response from server: 200
runestonebase.js:387 Response from server: 200
runestonebase.js:387 Response from server: 200
runestonebase.js:387 Response from server: 200
runestonebase.js:387 Response from server: 200
runestonebase.js:387 Response from server: 200
runestonebase.js:387 Response from server: 200
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
runestonebase.js:399 resolving checkServer with server data
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
runestonebase.js:399 resolving checkServer with server data
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
runestonebase.js:399 resolving checkServer with server data
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
runestonebase.js:399 resolving checkServer with server data
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
runestonebase.js:399 resolving checkServer with server data
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
runestonebase.js:399 resolving checkServer with server data
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
runestonebase.js:399 resolving checkServer with server data
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
runestonebase.js:399 resolving checkServer with server data
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
dragndrop.js:184 Replacing origElem with containerDiv
runestonebase.js:399 resolving checkServer with server data
runestonebase.js:660 MathJax Ready -- dequeing a typesetting run for __I1.2b.4 undefined
runestonebase.js:387 Response from server: 200
runestonebase.js:387 Response from server: 200
runestonebase.js:387 Response from server: 200
runestonebase.js:387 Response from server: 200
runestonebase.js:387 Response from server: 200
runestonebase.js:387 Response from server: 200
runestonebase.js:387 Response from server: 200
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
runestonebase.js:399 resolving checkServer with server data
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
runestonebase.js:399 resolving checkServer with server data
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
runestonebase.js:399 resolving checkServer with server data
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
runestonebase.js:399 resolving checkServer with server data
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
runestonebase.js:399 resolving checkServer with server data
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
runestonebase.js:399 resolving checkServer with server data
runestonebase.js:391 Data from server: "no data" calling repopulateFromStorage
runestonebase.js:399 resolving checkServer with server data
runestonebase.js:136 Save logging event {"event":"knowl","act":"open","div_id":"tech-detour-binomial-1-2b-2-3","course_name":"calpoly_iscam_winter25","clientLoginStatus":true,"timezoneoffset":8}
runestonebase.js:136 Save logging event {"event":"sage","act":"run","div_id":null,"course_name":"calpoly_iscam_winter25","clientLoginStatus":true,"timezoneoffset":8}
kernel.js:107 Kernel: kernel_starting (null)
kernel.js:107 Kernel: kernel_created (d96697e9-1e90-4f72-91f6-7719e72c6f3c)
kernel.js:464 Starting WebSockets: wss://author.runestone.academyhttps://sagecell.sagemath.org/kernel/d96697e9-1e90-4f72-91f6-7719e72c6f3c
runestonebase.js:177 POST https://author.runestone.academy/ns/logger/bookevent 422 (Unprocessable Content)
postLogMessage @ runestonebase.js:177
logBookEvent @ runestonebase.js:132
(anonymous) @ pretext.js:33
runestonebase.js:182 [
{
"type": "string_type",
"loc": [
"body",
"div_id"
],
"msg": "Input should be a valid string",
"input": null
}
]
runestonebase.js:222 Error: Error: Unprocessable Request Detail: [object Object] Status Code: 422
kernel.js:107 Kernel: kernel_connected (d96697e9-1e90-4f72-91f6-7719e72c6f3c)
kernel.js:107 Kernel: kernel_ready (d96697e9-1e90-4f72-91f6-7719e72c6f3c)

What is your username
runestone username: bchance

[bnmnetp]

The unprocessable request is happening when we try to log the event of running the sage cell, but in this case the sage cell does not have a valid identifier.

I don't know how you have written the question in PreTeXt but it seems likely that you have not given it either a label or an xml:id

[bnmnetp]

I just tried this on Runestone Academy and the R cell works fine for me. Did you change something since you opened this issue?

[iambethchance]

No And they worked fine for me in my pc for a while and were intermittent on Mac/ipad but once stopped working didn't again? I'll try now ... BC

…

Sent from my iPhone On Jan 3, 2026, at 6:45 AM, Bradley Miller ***@***.***> wrote:  [https://avatars.githubusercontent.com/u/51115?s=20&v=4]bnmnetp left a comment (RunestoneInteractive/rs#1105)<#1105 (comment)> I just tried this on Runestone Academy and the R cell works fine for me. Did you change something since you opened this issue? — Reply to this email directly, view it on GitHub<#1105 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ASC32KF22JYI3CMB36LHRYL4E7IW3AVCNFSM6AAAAACQSLZVP6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTOMBXGA4TSNRTHA>. You are receiving this because you authored the thread.Message ID: ***@***.***>

[iambethchance]

Just had issue in my phone Sent from my iPhone On Jan 3, 2026, at 6:45 AM, Bradley Miller ***@***.***> wrote:  [https://avatars.githubusercontent.com/u/51115?s=20&v=4]bnmnetp left a comment (RunestoneInteractive/rs#1105)<#1105 (comment)> I just tried this on Runestone Academy and the R cell works fine for me. Did you change something since you opened this issue? — Reply to this email directly, view it on GitHub<#1105 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ASC32KF22JYI3CMB36LHRYL4E7IW3AVCNFSM6AAAAACQSLZVP6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTOMBXGA4TSNRTHA>. You are receiving this because you authored the thread.Message ID: ***@***.***>

[iambethchance]

Currently throwing the error on iOS but not windows From: Bradley Miller ***@***.***> Sent: Saturday, January 3, 2026 6:45 AM To: RunestoneInteractive/rs ***@***.***> Cc: iambethchance ***@***.***>; Author ***@***.***> Subject: Re: [RunestoneInteractive/rs] Runestone Issue: Sage interactive cell "Evaluate R" throws "Unprocessable Request" (Issue #1105) [Image removed by sender.]bnmnetp left a comment (RunestoneInteractive/rs#1105)<#1105 (comment)> I just tried this on Runestone Academy and the R cell works fine for me. Did you change something since you opened this issue? — Reply to this email directly, view it on GitHub<#1105 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ASC32KF22JYI3CMB36LHRYL4E7IW3AVCNFSM6AAAAACQSLZVP6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTOMBXGA4TSNRTHA>. You are receiving this because you authored the thread.Message ID: ***@***.***>

[bnmnetp]

Just to be clear, are you always getting the error 422 error? Or is it the sage cell that is not actually running the program?

We use a public sage cell server that is not under our control. We have plans to change that but we have never had any issues with sage cells not running. Is this particular program compute intensive?

I see no reason why running it on phone vs windows vs mac vs ios would make any difference.

[bnmnetp]

I just tried again, and the sage cell just sat there spinning for minutes... It never finished. I reloaded the page and then it ran right away.

I've made a small change so that in the case where we can't find an identifier we just wont log the run of the sage cell. The identifiers should be added automatically by PreTeXt so in theory we should never see that dialog box for a sage cell.

We serve the same html page regardless of device.

[iambethchance]

Hi, The error message does seem to be the same no matter which Sage cell is throwing it. The usual pattern is the error pops up. If you press Evaluate (R) again it pops up again but then the code runs. With Chrome you are able to select “suppress messages” and then you don’t keep seeing the error. It is not computer intensive code and the error pops up even when I run the Sage cell in Inv 1-1 which dos not have to load in the outside functions. One thought is whether it is related to quality of internet connection as I don’t know why it would stop working for me on the PC last night but work again this morning, on both personal hotspot and hotel internet, so that doesn’t seem to be the issue (putting the iPad on both has no change in behavior). Thanks, Beth From: Bradley Miller ***@***.***> Sent: Saturday, January 3, 2026 8:10 AM To: RunestoneInteractive/rs ***@***.***> Cc: iambethchance ***@***.***>; Author ***@***.***> Subject: Re: [RunestoneInteractive/rs] Runestone Issue: Sage interactive cell "Evaluate R" throws "Unprocessable Request" (Issue #1105) [Image removed by sender.]bnmnetp left a comment (RunestoneInteractive/rs#1105)<#1105 (comment)> Just to be clear, are you always getting the error 422 error? Or is it the sage cell that is not actually running the program? We use a public sage cell server that is not under our control. We have plans to change that but we have never had any issues with sage cells not running. Is this particular program compute intensive? I see no reason why running it on phone vs windows vs mac vs ios would make any difference. — Reply to this email directly, view it on GitHub<#1105 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ASC32KGOVY5YECBO6KLG2KT4E7SW3AVCNFSM6AAAAACQSLZVP6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTOMBXGE3DENRVGQ>. You are receiving this because you authored the thread.Message ID: ***@***.***>

[iambethchance]

Hi, I had a similar error this morning (nonresponse) and I think that’s when it gets caught on an error so I added invisible() around the load and that usually solves that issue (even live). I redeployed about an hour ago. Is there additional console output we could try to send you? Here is the location in 1-1 https://author.runestone.academy/ns/books/published/iscam/inv1-1.html?mode=browsing which should be standard R ***@***.*** Other than loading in the data from GitHub. I’m guessing the GitHub connections are causing it to time out sometimes… but that doesn’t fully explain why it seems platform dependent. Beth From: Bradley Miller ***@***.***> Sent: Saturday, January 3, 2026 8:23 AM To: RunestoneInteractive/rs ***@***.***> Cc: iambethchance ***@***.***>; Author ***@***.***> Subject: Re: [RunestoneInteractive/rs] Runestone Issue: Sage interactive cell "Evaluate R" throws "Unprocessable Request" (Issue #1105) [Image removed by sender.]bnmnetp left a comment (RunestoneInteractive/rs#1105)<#1105 (comment)> I just tried again, and the sage cell just sat there spinning for minutes... It never finished. I reloaded the page and then it ran right away. I've made a small change so that in the case where we can't find an identifier we just wont log the run of the sage cell. The identifiers should be added automatically by PreTeXt so in theory we should never see that dialog box for a sage cell. We serve the same html page regardless of device. — Reply to this email directly, view it on GitHub<#1105 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ASC32KEPPKTTJAVGK33BIUL4E7UGTAVCNFSM6AAAAACQSLZVP6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTOMBXGE3TCMZZGM>. You are receiving this because you authored the thread.Message ID: ***@***.***>

[bnmnetp]

Crazy, I just ran it from my iPad without any problem.

[bnmnetp]

The only thing that will help at this point is if I can recreate the issue so I can inspect the html and try to figure out why it is not finding the container with the id.

OK, I have recreated it. (had to use chrome instead of Safari)

The issue is that we start with the button and look outward for the first parent of the button we find that has the class of "sagecell-sage". In the case for your book, I'm not finding anything on the page with a class of sagecell-sage.

My guess is that because your sagecell is inside a hint (a PreTeXt knowl) that does not hold true. I saw a comment in the source that sagecells in knowls are handled by knowl.js

@rbeezer or @ascholerChemeketa Any thoughts?

[bnmnetp]

Inspecting the source for both, it looks like both knowls and non-knowl sage cells have a container with the class "ptx-sagecell". The non-knowl versions have both ptx-sagecell and sagecell-sage

I'll make that change and push a release.

[bnmnetp]

OK, I have pushed 7.11.7 which fixes the problem for me.

As a side note, the reason I was not reproducing it before was because I was using iscam so I didn't have to add myself to your course and was not logged in at the time.

[bnmnetp]

@rbeezer, @ascholerChemeketa -- the inconsistency may not even be an issue to worry about now that I have found a better selector for logging sage cell runs.

[rbeezer]

There is some variability in identifiers based on what language is in use. R vs Sage here? Not in a position to check, but your solution sounds more robust.

…

On January 3, 2026 3:58:38 PM EST, Bradley Miller ***@***.***> wrote: bnmnetp left a comment (RunestoneInteractive/rs#1105) @rbeezer, @ascholerChemeketa -- the inconsistency may not even be an issue to worry about now that I have found a better selector for logging sage cell runs.