How to use penpot with zerotier?

Hi, I can’t use penepot properly in combination with Docker self host + zerotier.

The biggest problem is that I can’t register a penepot account on other (zerotier linked) networks, I can only register on my self host’s local computer before I can log in on other devices linked to zerotier’s network.

The screenshot below is me registering with github login authentication turned on, regular email registration doesn’t work either. I always get the error in the upper right corner [A problem has occurred.]

I have changed the PENPOT_PUBLIC_URL to the zerotier network public address but still the same.