Your log is filled with this message:
Oct 12 06:58:39 zaBOX nginx: 2022/10/12 06:58:39 [error] 11969#11969: *370706 connect() to unix:/var/run/php5-fpm.sock failed (11: Resource temporarily unavailable) while connecting to upstream, client: 192.168.0.103, server: , request: "GET /Main HTTP/2.0", subrequest: "/auth-request.php", upstream: "fastcgi://unix:/var/run/php5-fpm.sock:", host: "zabox.local", referrer: "https://zabox.local/Dashboard"
Oct 12 06:58:39 zaBOX nginx: 2022/10/12 06:58:39 [error] 11969#11969: *370706 auth request unexpected status: 502 while sending to client, client: 192.168.0.103, server: , request: "GET /Main HTTP/2.0", host: "zabox.local", referrer: "https://zabox.local/Dashboard"
What is the client 192.168.0.103?