I’m seeing the same message today, although the error code is different. There is already a hint on the page itself that something is wrong, since the maps to ban or favorite are not working. How I came here: At first the page was working fine today and I could play a 1v1. After that I queued for 3v3 or 4v4 and upon match found people left, it took some time for the page to update and after 20 minutes of waiting and rejoining the queue, I couldn’t unqueue anymore. I went back to main menu and then opened ranked multiplayer again but it opened with a bugged version of already being joined to the queue. So I exited and restarted the game, but now I ended up with the bugs from these screenshots.