system diagnostics didn't work and it was hanging forever.
2024/01/22 15:44:07 [error] 9215#9215: *27035 auth request unexpected status: 504 while sending to client, client: 195.*****, server: , request: "GET /VMs HTTP/2.0", host: "195.*******:4114", referrer: "https://195.*********:4114/Main"
, upstream: "fastcgi://unix:/var/run/php5-fpm.sock"
2024/01/22 16:25:29 [error] 9215#9215: *34192 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 192.168.1.158, server: , request: "GET /Main HTTP/2.0", subrequest: "/auth-request.php", upstream: "fastcgi://unix:/var/run/php5-fpm.sock", host: "****.local"
restarting php5-frm resolved it
command:
/etc/rc.d/rc.nginx restart
/etc/rc.d/rc.php-fpm restart