Discovered a bug where, if I log in whilst the patch is still installing, it goes all the way up to 100% with and ETA of 0, but doesn't complete to show the Play button.
If I log out and open it again, it doesn't download at all and is stuck at 0%.
If I try to initiate a full repair, either through the log in page or once logged in, it just closes the window and doesn't do anything.
The only solution is to completely uninstall League and then reinstall it.
This has happened to me twice now. The first time, I thought it was a bug with my computer (cuz it was having issues), but it's happened again, through the same means (logging in before patch is fully installed). Well, I hope that's the case anyway. Don't really want to uninstall and reinstall each patch, haha.
If anyone else is having this problem, try and wait for the download/installation of the patch to complete fully before logging in, and it might prevent it.....?