Error during the selection or ranked>>"disconnected from Maestro...etc etc>>now ON Leaver Booster.

I am currently getting an error window, during the selection process for ranked games, with something in the lines of "Disconnected from Maestro....the client will close now" and this happened to me a few times and now I get the "Leaver punishment of 20 min wait"

The selection process goes through, on ranked games if you ignore Disconnected from Maestro error but the game will never start, hence after doing this a few times, I got the Leaver Booster punishment.

Can anyone tell me how to fix this issue? I did uninstall and reinstalled the game a few time and it still won't work.