Nginx Proxy Manager: Custom locations don't work

[Iacov]

Just so we're clear, the code block in your last post.  You don't have that entire thing in BOTH / and /socket, right?

no, of course not xD
i did enter it in the "advanced" tab, where you can manually define a custom location (i did have to solve it similarily for my pihole)

when posting the individual code blocks (as per the linked guide) into the configuration for the custom location (in the "custom location" tab), i get the offline client

so the furthest i've come:
- posting official config into custom location tab -> offline proxy client
- adapting official config with bing chat for "advanced"-tab syntax and posting it in there -> online proxy client, but wrong forwarding (ending up on "welcome to openresty" page)

i still don't understand why i need the "/" and "/socket" custom location, but as it is in the documentation, i want to abide to it