RE: Insufficient Permission on Reactivating Case
Ok, so this is how you can figure out the solution. I'm using Google Chrome.
EDIT: You need to have developer tools open first (F12), and then try to reactivate the case for the error to show up.
You get this cryptic error message when you download the log file, mine was: Error_Message_0x80040220
1. Hit F12 to open developer tools.
2. Click the Console tab.
3. look for an error in this list. This is what mine looked like if you can see it, it is a 403.

4. Click the link in the error.
5. This will take you to the network tab where there should be a red error, click this to open the error message and expand the message:

This error should tell you what entity you need to grant access to.
Thanks,
Coty