Auth0 login going wrong

[justinkruit]

We are running Buggregator behind a reverse proxy and an auth0, but the login doesn't seem to go correct.
When trying to sign in, you're being redirected to https://buggregator.domain.name/https://buggregator.domain.name//auth/sso/login

.env config:

AUTH_ENABLED=true
AUTH_PROVIDER=auth0
AUTH_PROVIDER_URL=https://name.us.auth0.com
AUTH_CLIENT_ID=*************
AUTH_CLIENT_SECRET=****************
AUTH_CALLBACK_URL=https://buggregator.domain.name/auth/sso/callback
AUTH_SCOPES=openid,email,profile

If I need to provide any more details, I'll be happy to!