New client is stuck in an infinite loop "Problem with your connection"

Basically, my client is stuck permanently in a problem with your connection loop. How do i know it's not my internet? Well first of all i'm writing this bug report. Second of all i checked everything, internet is perfectly fine. The most annoying part is you only have 2 options, and both are shutting down the client. And when i open up the client again? You guessed it, this message.

So what do i do? I can't launch the legacy client because the actual button is un-clickable thanks to this annoying internet problem pop up.