In another post you’ve mentioned you are running one Admin account. If there are any errors with your permissions, wouldn’t it prevent the fix from working?
Note, the fix that has been mentioned Fix broken group membership is run as root and not admin.
Addendum:
You seem to have lots of problems with your system. At the moment, you are playing whack-a-mole trying to fix small annoying issues but it looks like something else is broken. Take a backup of your system and check all things linked to LDAP.