[Bug]: "Game in progress"

I queued up for a game of Ranked TFT (Last Placement game) & after I clicked the Play Button during the "Match Found", the client said that there was "A Game in Progress" Yet the game did not open for me. After waiting for what felt like an eternity, the client gave me a [Reconnect] Button. Only clicking this doesn't bring me into the game, it will say that there is a CRITCAL ERROR and ask if I would like to make a crash dump.

What should I do from here? Should I just wait for the game to be over? Currently trying to Troubleshoot/Repair the client at the login screen, will update if anything changes.

[Update 1]: So after completing the Client Repair & logging in, it gave me yet another **CRITICAL ERROR **& the reconnect button comes up. It also says I'm still in-game. Yet it also showed me that I was placed in Iron 1 - 30 LP.

[Update 2]: After restarting my PC altogether, it finally started up the game. Unfortunately the game had already ended so it closed out & gave me a box that read "This game no longer exists, play a new one!". After that the client went back to the main hub & I no longer had the CRITICAL ERROR coming up. While this means I am free to actually queue up again & hopefully get to play my next game (assuming a CRITICAL ERROR doesn't happen again), I am quite upset that I could not finish my placements due to this bug (because I could not play, It counted my last placement game as an auto-loss).