What app is this about, and its version: Calibre Web - OPDS connection
What YunoHost version are you running: 12.1.39 (stable)
What type of hardware are you using: Raspberry Pi 3, 4+
Describe your issue
This is not really an issue, more a kind of solution to OPDS authentification.
I managed to get OPDS acces WITH authentification by adding a Nginx location /yourlib/opds.
I did that just by copying the /yourlib/ location, I’m not good at Nginx, so maybe it’s not fully correct, but I think adding a location in nginx configuration inside the package could solve authentification failure and not pass to un-authentificated open doors.
Regards.
Share relevant logs or error messages
.