Hi @nick23, welcome to the Auth0 community, how are you?
What gets my attention in the error message you shared is that the domain seems incomplete. Did you enter the right domain name in your settings? Normally it follows the pattern {tenant-name}.region.auth0.com.
I’ll follow up also with the internal teams to see what else could it be as I haven’t seen that error message before and I’ll let you know as soon as I get feedback.
Thanks,
Juan