[CRASH] Client chrashed on champion select, after that I couldn't reconnect

I queued up solo for ranked. When it was my turn to pick I couldn't chose, so I picked Ahri but didn't lock in. The pick timer went to 0 and then it all froze. The lock in button turned gray, but there was no timer anymore. I couldn't see what the ememy had picked after me. I've waited 2 minutes, then the "League of Legends" logo apeared like it was going to start loading, but no. 3 seconds after that, the game crashed and I got the reconnect button. I clicked it, waited 1 minute, then the screenshot below appeared. I clicked reconnect again, waited 1 minute and again "unknown error". I repeated the same procces 4 times, when on the fifth time it actually reconnected and started loading. When I entered the rift, the score was 1/12 already and I was apparently the only one who had had the same problem.

I had internet connection while I was trying to reconnect. I've checked the server satus for EUNE and everything was fine. I haven't had the same issue before. I haven't made any changes to my firewall or internet options since my last succsesful game. I haven't updated Windows since then.

I lost the game and 17 LP.

I hope somehow i helped Riot's team to fix the issue. I would be really happy if I got something in return for my efforts to report the issue(like some LP redemtion) :)

-Tolumbas