I can't login anymore -

When I try to login I get this message all the time "We're sorry, but something went wrong." and then I can't look at any soup.io page at all. But if I remove cookies, It's ok until I try to login again.

What could be wrong?

It happened after I created a new group, posted image, left the group, relogged to group account, removed the group account and then tried to login to my main account.