NGINX/GUI Issue

So out of nowhere I have started to experience issues when trying to access the GUI, all my docker containers still work I just cannot access the dashboard. The only recent change that I made was install wireguard, which I have now removed. The logs show the following messages.

Jun 12 21:36:21 Zeus nginx: 2021/06/12 21:36:21 [error] 15663#15663: *24504 auth request unexpected status: 504 while sending to client, client: 192.168.1.42, server: , request: "GET /plugins/plexstreams/ajax.php HTTP/1.1", host: "192.168.1.33:8282", referrer: "http://192.168.1.33:8282/Dashboard"

Jun 12 21:36:37 Zeus nginx: 2021/06/12 21:36:37 [error] 15663#15663: *24572 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 192.168.1.42, server: , request: "GET /plugins/plexstreams/ajax.php HTTP/1.1", subrequest: "/auth_request.php", upstream: "fastcgi://unix:/var/run/php5-fpm.sock", host: "192.168.1.33:8282", referrer: "http://192.168.1.33:8282/Dashboard" Jun 12 21:36:37 Zeus nginx: 2021/06/12 21:36:37 [error] 15663#15663: *24572 auth request unexpected status: 504 while sending to client, client: 192.168.1.42, server: , request: "GET /plugins/plexstreams/ajax.php HTTP/1.1", host: "192.168.1.33:8282", referrer: "http://192.168.1.33:8282/Dashboard"

Jun 12 21:18:43 Zeus php-fpm[13770]: [WARNING] [pool www] server reached max_children setting (50), consider raising it

Restarting seems to fix it but only for a little bit.

Any ideas?

Thank you