I don't really understand, as I just tried playing the game from my first account made. I connected with Facebook to start, and then started loading the game. When it came up, I tried connecting to facebook which did nothing so I went o my account area and set a password. When I try logging in, i'm told I can't make any new free accounts on this computer..
This is the first and only time I've tried playing this game. I don't understand what I'm doing wrong..?
Submit a support ticket ASAP: https://www.spiralknights.com/support/#mail
This isn't a problem you can solve on your own, most likely.