[CLIENT] Stuck in spectating mode. Can't access most of the client. Can't play games.

Last night I spectated a game. Then I left the game. But the client thinks I'm still spectating that game. All I can see is my friends list, missions, messages, and menus on the right side of the client. The other side is dark (except for the Overview, Champion Reveal, Nexus, and Patch Notes buttons, which don't do anything). I can't join my friends' lobbies. My status says Spectating. I could upload a screenshot, but I don't know how.

I have closed and reopened the client. I have turned my computer off and back on. I have even used the cog button in the top right corner of the client and initiated a full repair of the client. The game I spectated ended over 20 hours ago. I do not even understand how this still is happening or how I can fix it. I am kind of hoping the next patch/server maintenance may solve the problem for me.

I can't say much about reproducing it. It may happen any time you spectate a game.