I'm surprised no one's ever posted a ticket about this.
Description of Issue/Error: When adding moderators to a forum, I received a fatal error in the Admin Control Panel. When I go back and refresh, it says I've successfully added the moderator - the person's name is shown there. However, this doesn't translate to the forum itself. In my case, I was trying to add Prof. Maeve Marlowe to be the moderator of the School Contests forum in the Hogwarts library. The fatal error occurred, I went back and refreshed, and it shows that she's now a moderator. When you go to the school contests forum, it does not show her as a moderator; it shows Prof. Ryland Mrotek, a previous librarian, as moderator. This person isn't listed in ACP as one of the mods. And in the end, despite what ACP shows, Maeve does not receive mod power.
Adding the Hogwarts Staff secondary group, which already had mod powers prior to this happening, gave Maeve the mod powers she needed.
I'm told by Maeve's writer that they've had a similar problem with adding moderators to the Dark & Dangerous Creatures reserve in Sweden. I also think this has been an issue for months, so I was surprised no one posted a support ticket about it?
URL link of where issue/error occurred: It happened in ACP. Won't link to that for security purposes.
Your Browser: Chrome. I don't know what browsers others have had this problem in.
Screenshot of the error/issue: