If you have unsubscribe requests for a course, you should see a link in the /appCore/index.php?r=alms/course/show page

you should use the jump to built in feature to correctly handle mvc paths

Solution:
create a new mvc module with only a show controller that would redirect to elearning/show&id_common_label=-2
Done.

Why don't you open a new thread for each request?

It's definitely a bug, I'm sorry to contradict but everyone can replicate.
The link where canelli was supposed to move you has nothing to do with it.

Found! In middlearea table there is a referral to tbl_label, that activates a "label" tab in main elearning page. When clicking on this tab, you get the error, as there is no frontend mvc module for the Labels. In /widget/lms_tab/views/lms_tab.php each record of middlearea table is rendere...

What is the url of the page that gives you this error?
There is no LabelLms mvc, but LabelAlms... I suppose you are in the admin area, aren't you?

No problem with the code. The problem is on your server.

No analyze no fix.
Good luck.

tempuser I can help but I need some info, PM me to provide ssh access.