Backoffice login

Has something changed with backoffice logins in 17?

I have setup my test site on my raspberry pi (behind a Pangolin/newt proxy) however I can’t get to the login screen, I get the following error

error:invalid_request
error_description:This server only accepts HTTPS requests.
error_uri:https://documentation.openiddict.com/errors/ID2083

My 16.2 site I can log in fine