can't grade assignment

[ellenmei]

After clicking "Grade" button in a specific assignment page, a new window pops up and the grading area is gray and can't grade student's assignment. Please help!

[cr0ybot]

I'm having the same issue, and I've spent days trying to track down the problem with no success. Did you ever find a solution 3+ years ago that you'd happen to remember?

The only thing that changes anything so far is to turn off JavaScript caching, which gets the main area to load but it doesn't look like it's loading the correct context.

Once the javascript loads, the "x of y" count under the "Choose User" dropdown changes to "0 of 0" (page loads with correct numbers). Whether or not I have JS caching turned off, clicking prev/next arrows or choosing a specific user makes the main screen load correctly.

I'm not getting any useful error messages from the browser console or the server error logs. I get a moodle-core-event: Global event published: FORM_ERROR on every page load regardless of if I'm in the grader, and a Coding problem: $PAGE->context was not set. on the server. I haven't been able to trace whether either of these are actually related to the problem.