@Robocopmax same here, today I was finally able to log in again, just to be meet with the cloudflare verify problem again, which lead to me having the 403 error in the first place. I cleared all browser data but still no luck. Maybe it's another DDOS or something?
Could be. But i rather suspect that the used browser somehow can't retain the verfication token.
I have found an functioning workaround in this discussion: https://itch.io/t/5428675/new-human-verification-fails-on-app?after=20
However the developer tools window needs to stay open the whole time. And for evry new session of the browser you need to repeat the process.