likely your proxy serves wrong cert for local access. please review
- 101: reverse proxy
- 101: Split-Brain DNS (split-horizon)
and compare the certificate you see interneally and externally - I bet you see different certificates. next review logs (especially reverseproxy ) and check why you see different certificates.
looking at browser dev tools (f12) â network helps a lot - you see hostname and ip address where it connects to.