Laravel, awaiting response when try to access from VPN connection

Good morning, I have a problem with a Laravel v.10 platform.
Installed as a VMWare virtual machine on Debian 11 with nginx.

If I access from the local network everything works fine.
However, if I try to access via VPN, the request remains in “waiting” until I get a timeout error. I ping the server correctly.
If I try to replace the index.php (in the public folder) with a “echo”, it works fine.
If I try to put an “phpinfo()”, I still have a “waiting”.
It seems that Laravel or php intervenes in the request processing, but I don’t understand where and how.
You can help me?

Thank you