I only installed bitcoin core because Armory Needs it. I don't do and haven't done anything with bitcoin core. None of the wallets has any coins so no big risk I guess.
Check that a .cookie file exists in Bitcoin Core's data directory. If it doesn't, restart Core.
I'm going to split this thread and move it to Armory.
Yes, there is a .cookie file, I hadn't noticed that before. I opened it with notepad and it just has __cookie__ followed by about 50 random characters.