unable to search game/friends list disappeared/unable to click the "play" button

After the game automatically updated, I failed to play leagues suddenly since yesterday. Three scenarios appears:

1. The most common one: friends list disappeared (complete dark), tried to find a match, but doesn't work
2. The friends list appeared, but "play" button disappeared, showing that I need to exit and reopen the league. Followed what it said, but nothing changed
3. Did show friend list and the "play" button, however, when I try to search a game, it shows that I am not ready *Tried to restart the leagues over thrity times, restart my laptop 20 times, restart to modern for 10 times, but these didnt't help. Even tried to remove lol, and redownload and re-install it, which does not make any difference, and the bug still there. Pls kindly help with fix this bug, which makes me depressed and disappointed :(