there was a server error log in admin panel, so just delete that error and install this version. That should fix it.
there was a change in the "React to comments" phrase in usergroup setting. So you might have "React to comments" set to "No". Please check your usergroup settings for FCS.
there was a change in the "React to comments" phrase in usergroup setting. So you might have "React to comments" set to "No". Please check your usergroup settings for FCS.