Nginx Proxy Manager issue

so i’ve changed things up a bit because running nginx on home assistant box apparently broke my konnected alarm panels communication with home assistant. i’ve decided to use the built-in proxy manager in my synology to do the proxy and am having issues. I know how to create a proxy, forward it to the right place, assign a certificate to the right proxy, etc… i have this setup correctly with my synology and it works as expected. when I go to set it up with HA i just get a “400 Bad Request” page. i currently don’t have anything in my http section of home assistant config. i can access my home assistant fine on my LAN at it’s ipaddress:8123. this is also the address i’m forwarding in synology’s proxy manager. any idea what could be wrong?