I've been playing League of Legends for quite some time now and I never had a problem like this.
Whenever I go into champ select screen, sometimes the program just stops working. It still stays open, music plays, countdown continues, but I cant do a thing. I can't change spells, can't select a champion, and the pick process doesn't continue. Then, when I'm in luck, sometimes after 20 secs or so it comes back, and shows everything updated, like the next picks etc. But until then, my time to select a champ is over and it bugs even more, and I can't do anything again, other than close the client and reopen it.
I lose LP, and I can't join the queue for a lot of time, like 30+ minutes, because this happens constantly. When I'm first pick I might get to pick a champion and lock in and the bug might happen after that, so I wait the time I estimate the pick process would've taken and close the client and reconnect again. I haven't gone through a normal pick process and game in over 10 games.
I also very often get a message in the client, when I'm not in a queue or anything, that says "Unknown error. Sorry about that. We've sent a report to the server". Also, the game crashes when champion select is over and I'm going into the game, saying "The game crashed. Please try to reconnect to the game" and then I have to attempt 2-3 times to reconnect before it actually happens. I also periodically get disconnected from chat. It reconnects after a while, but then disconnects again.
Also, I have trouble joining the queue. It will go on and on for 5-6 minutes, and then I have to exit it and join again, when estimated time is one minute.
I'm not in diamond or anything for it to be normal... I'm Gold trying to go up, but I've fallen an entire division because the champion select screen bug counts as dodging and I lose massive amounts of LP.
Has anyone experienced the same or knows any solutions to this problem?
Here are two screenshots of the error messages I get: