Hello,
When trying to manage students through the course admin page [../course/course_name/admin],
The first page loading correctly with no errors (../course/course_name/admin)
When trying to load the first page through breadcrumbs : (../course/course_name/admin/?action=&items_page=1) : Doesn't working correctly (Attached)
Next pages (../course/course_name/admin/?action=&items_page=2) : Doesn't working correctly (Same attached errors)
Also i think there is an issue with (Course started time) for some users, in the attached file (Issue No.2), This user removed from the course and added after a while.
Unable to replicate the issue at our test and demo sites. Please Try deactivating third party plugins for this and also please try disabling the minifications in your site if you have done any .
Needs admin credentials and site url to check the issue at your end .
Ps : mark reply as private while sharing the credentials .