I have a long-standing bot user (DasyBot) on Wikia, which has been active on its original wiki (Coasterpedia) for 2½ years. The last successful edit I made with it was on July 16.
I now have this bot extended to three other wikis on which I am an admin, for immediate need in one case and in case of future need on the others. However, trying to log in via AWB now results in an error message saying that this is "not an authorised bot"(!?!?), despite the user's bot flag (and a CheckUser page on two of the four wikis) saying otherwise.
(edit) See this thread on Wikia Community Central for further details. By adding an "AWB/CheckPage" page to the two wikis which didn't have them, and a Bot template to all four user pages, I have managed to get AWB to run without disabling itself when I log in; but I still am not allowed to use it in bot mode, and without this there's no point in using it at all.
(Incidentally, why can't I assign a "Wikia" tag to this report?)
I suspect this is a bug introduced in a recent update. Perhaps the code is making the false assumption that all MediaWiki wikis are in the Wikimedia Group, and that any bot which is not authorised on Wikimedia must be blocked? Could another check be added, to ensure that the wiki to which login is being attempted is actually a Wikimedia wiki, before imposing Wikimedia security policies?