Website owners can literally do what they want to do with their websites, that’s beyond the control of Cloudflare, even when the website owner choose to use Cloudflare.
Contact the website owner, and at the bare minimum, include the Ray ID you see on the error page, and they will be able to dig deeper in to the situation with you.
Neither Cloudflare, nor the Cloudflare Community have done that.
The website owner have locked you out of your wallet.
That won’t work, you need to contact the website owner.