Could not open login script file

**PHP version: 7.4.21
**MySQL version: Ver 15.1 Distrib 10.3.28-MariaDB
**Webserver (Nginx, Apache...): Apache
What is the expected behaviour?
What do you see instead?
PHP logs on pastebin:

I have was able to install openvpn-admin, and I can login with username and password.

However, I need to change the login.sh script to login.php script and move to another location, with ownership being a user, instead of root. The login.php will do authentication with another database library, which has been set up already, that is why I have to move to a new location.

I also try to put login.php under /etc/openvpn/scripts diretory, and include the external library file into login.php using full path. It doesn't work either. The file is definitely there.

Below is my auth-user-pass-verify:

auth-user-pass-verify "/usr/bin/php /home/www/domain/scripts/login.php" via-env

I restart the apache without problem, but when I try to login, the log show errors, as below

Could not open input file: /home/www/domain/scripts/login.php 10.1.10.56:49174 WARNING: Failed running command (--auth-user-pass-verify): external program exited with error status: 1

The login.php script is definitely there.

Please help.

Many thanks

Chocobozzz / OpenVPN-Admin

Could not open login script file #172