Custom location jc21/nginx-proxy-manager:2.11.1

[KassCroute]

Hello,

I'm using NPM on Debian 12 with docker compose. I have some issues with the custom location (maybe I don't understand how it works). I already searched for similar issues but no solutions worked for me.
If I have no custom location, everything is working well. You can see that my forward hostname is also a container.

The thing I want to achieve here is to only access one part of my web app sav.mydomain.com/public/ticket.

So I decided to setup a custom location like that (I tried several configuration none of them worked) :
First try :
Forward Hostname : dolibarr-dolibarr-1.dolibarr.mydomain.local/public/ticket

Second try :
Forward Hostname : dolibarr-dolibarr-1.dolibarr.mydomain.local/public/ticket

And when I save the host stay offline. And I can see these errors :

Thanks for your help