So I log'd in and wanted to start off my first match of the day with some ARAM. So I went in a room it had only 4 people in it. So I didn't want to wait that long so I left and then when I tried to go to another almost-full room it said "You cannot join game (Some random numbers) because you are already in game [Some random numbers]"

So then I tried to go to Normal's and it said that same thing "You will not be allowed to join the queue because you are certainly assigned to an existing game"

And now I can't plat at all....

The exact same just happened to me. I was in a ARAM lobby and after champ select countdown instead of the game starting the client just sat there. Someone in the chatbox said "buggy room gg" so we all pressed quit. After leaving that game, I tried to join another ARAM custom game and the same prompt came up.

"You cannot join game 662045505 because you are already in game 662045505[662190222]"

Sucks.

Damn, So were stuck like this and are forced to not play? lol.

EDIT: Well now it works for some reason. But still that was weird.