Igor Lanko I was able to fix the problem myself. Here's what happened - I renamed my space but the caching doesn't understand it; it still thinks the old spacename is valid. It took me a while to figure this out. You need to delete all cookies, then it worked again after logging in. However, this is a bit cumbersome.

Dennis, huh, that's unexpected. When you update the profile, it should reissue the cookie as well...

I'll look into this! What browser & version are you using, just in case?