I'll get some more information depending on where we get to.
Today, I upgraded from 9.1.5 to 9.1.6 (this is an existing install of OC I've had for ages). When I went in to reneable the calendar app, I got an error:
Signature could not get checked. Please contact the app developer and check your admin screen.
On the admin page, I see this message:
The following list covers which files have failed the integrity check. Please read
the previous linked documentation to learn more about the errors and how to fix
- Certificate has been revoked.
[calendar] => Array
[EXCEPTION] => Array
[class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
[message] => Certificate has been revoked.
This looks like purely a calendar issue (not a core OC issue), correct? I found a few posts in the store about this same thing...
Like I said at the start, I can post any info you guys think might be helpful if you really think it is a core OC issue.....