Nginx Proxy Manager: Custom locations don't work

[Iacov]

Never used Nginx Proxy Manager but it feels like you need to remove that first line that says LOCATION: /

i tried, but there's no difference, unfortunately

Do you have "Cache assets" enabled?  If so, disable it.

yes, it's enabled per the linked guide
normally i never activate it with my proxy hosts - why should i disable it with jellyin? (vs the documentation stating to activate it)