I have the feeling different problems are mixed up in this thread, mostly the Spinning Castle problem for the latest posters, which can be solved as follows.
In order to get out of the Spinning Castle problem, you need to open a private(Firefox) or incognito (Chrome) window , go to dominion.games, enter your Name and Password, but don't click "Login". Instead, click on "Kick and Resign" (small font below the "Sign Up" button). Then you should be able to login normally (no need for private/incognito tab).
In order to get out of the Spinning Castle problem, you need to open a private(Firefox) or incognito (Chrome) window , go to dominion.games, enter your Name and Password, but don't click "Login". Instead, click on "Kick and Resign" (small font below the "Sign Up" button). Then you should be able to login normally (no need for private/incognito tab).