[SOLVED] Cannot access main UI overview only from outside

[vanja (galaxy)]

Hi @mueller-ma I answered you on github and closed the issue.
you had a good hunch about headers
copy pasting my answer here just if someone will search the forum:

I found:

OH3 with NGINX Reverse Proxy and Authentication

Hello, I’m trying to make it work, but even after adding this lines to nginx config file I still get “502 Bad Gateway” response. Any ideas?

Header set Set-Cookie "X-OPENHAB-AUTH-HEADER=1"
    ProxyPreserveHost On
ProxyPass / http://127.0.0.1:8080/
ProxyPassReverse http://127.0.0.1:8080/ /
  	Header add Authorization ""
  	RequestHeader set Authorization ""

I added these 4 lines - 2 before proxy pass and 2 after and everything works! even the tabs are visible now!
you can close the issue, thanks!