Can't open the In Game Client

After i played a game i wanted to check the replay,while in the Loading screen the whole in game Client disappeared and i haven't been able to get into it again. After that i tried playing a game, where i wasn't able to get the loading screen up, while that happening, i just had the client open, telling me that my game is in progress without having the ability to reconnect. I tried multiple times to enter the loading scree by using the practice tool, but nothing every time after the CS i get an Error message: https://prnt.sc/og88pn

I can't open any game mode