For anyone who's having "Client issues" or "Attempting to reconnect" or "Black Screen"
Hello,
Just like some other people I've had issues with the title name and it did get quite annoying. The client seemed to blame my machine for things it couldn't, but should figure out by itself.
Anyways, if you go into the League directory (ex: c:\Riot Games\League of Legends), then go into the "Plugins" folder and delete the following folders "rcp-fe-viewport" and maybe "rcp-fe-lol-lock-and-load" ( I have deleted both based on the debug.log that exists in the main folder)
When you start the client, these folders will be downloaded again and the issues should stop.
@Riot, please fix this as I believe it's a tiny bug somewhere in the system.
Thank you, happy gaming and Merry Christmas!