Group Set Error in Hypothesis Assignments After a Canvas Course Term Has Ended

[janraev]

Bug report form

Steps to reproduce

1. In a Canvas course, create a Hypothesis assignment with groups enabled.
2. In the course settings, change the term to a term whose end date is set in the past. This is to simulate as if the course has ended.

3. Using a Canvas instructor account, open the Hypothesis assignment.

Expected behaviour

The Hypothesis assignment will open successfully.

Actual behaviour

Tell us what happens instead.
Group Set Not Found Error shows up

Browser/system information

Chrome 149, MAC OS 26.0

Additional details

If a user with admin role is enrolled in a course as an instructor, that user is able to open the Hypothesis assignment successfully.

Sample assignment: https://hypothesis.instructure.com/courses/742/assignments/9577 (Use instructor account for education+demoinstructor2@hypothes.is)

Log in New Relic: https://onenr.io/0ZQWPA8xpwW

HS Ticket: https://app.hubspot.com/contacts/6291320/record/0-5/45836352788

The error is coming from line 96 of https://github.com/hypothesis/lms/blob/main/lms/product/canvas/_plugin/grouping.py#L96

[janraev]

Here's Instructure Support's response on the question...

Is there a way to allow non-admin users (who are not students) to retrieve group_categories through the Canvas API on concluded courses?

Instructure's Answer:

Unfortunately no, as that is just a limitation of the instructor role. Something you may want to consider is generating a token on behalf of an admin which should always have access to that data, while you continue to use the teacher's token for other requests.

Some other tools have also had the school create a special admin user for that purpose, and you could also use that user's token for those requests.