It will get stuck on request accepted if you log in to the wrong account on the site and use another one in the game as far as I know. Make sure that you're actually signing in to the same accounts both in game and on the site, and make sure you're using the same capitalization on both usernames.
If you double check this and it still doesn't work, try using another browser, Chrome or Firefox depending on what you already tried using, and if you're still having issues and users are playing the game, it can only be your internet or the computer you're using that is being the issue.