Standing up a new Discourse forum as a separate docker container on a dedicated physical server that is already running an existing Discourse forum (which is humming along with no errors).
Bootstrapping works without errors and the initial “You’ve successfully installed Discourse!” message appears without issue, and I can enter my desired username & PW without any error. However, on submitting the form, rather than sending the initial registration email, Discourse displays a white page with
["BAD CSRF"] in the upper left corner.
I’m honestly not even sure where to start troubleshooting this. Searching here on meta didn’t really yield any results that appear relevant.
Suggestions on where to start looking?