Issue Plesk web site very slow

[Micro$oft]

Plesk slowed down to the place where the panel site stopped
web site: https://www.cp.serverscity.net/clientarea.php
My Plesk server is very fast but my site is too slow
I'm just using apache. Opening speed of my site takes 30 seconds
Plesk logs;
Screenshot

Error_log

[Mon Sep 17 16:28:31 2018] [error] [client 213.74.119.18] File does not exist: /var/www/vhosts/cp.serverscity.net/httpdocs/templates/default/images, referer: https://www.cp.serverscity.net/
[Mon Sep 17 16:49:10 2018] [warn] [client 176.237.140.135] mod_fcgid: read data timeout in 250 seconds, referer: https://www.cp.serverscity.net/degidiaq/clientsservices.php?userid=882&id=2303
[Mon Sep 17 16:49:10 2018] [error] [client 176.237.140.135] Premature end of script headers: clientsservices.php, referer: https://www.cp.serverscity.net/degidiaq/clientsservices.php?userid=882&id=2303
[Mon Sep 17 21:24:20 2018] [error] [client 82.221.105.6] File does not exist: /var/www/vhosts/cp.serverscity.net/httpdocs/robots.txt
[Mon Sep 17 21:24:23 2018] [error] [client 82.221.105.6] File does not exist: /var/www/vhosts/cp.serverscity.net/httpdocs/sitemap.xml
[Mon Sep 17 21:24:24 2018] [error] [client 82.221.105.6] File does not exist: /var/www/vhosts/cp.serverscity.net/httpdocs/.well-known/security.txt
[Mon Sep 17 21:56:08 2018] [error] [client 94.54.128.73] File does not exist: /var/www/vhosts/cp.serverscity.net/httpdocs/templates/default/images, referer: https://www.cp.serverscity.net/
[Tue Sep 18 22:15:16 2018] [error] [client 176.237.140.135] File does not exist: /var/www/vhosts/cp.serverscity.net/httpdocs/templates/default/images, referer: https://www.cp.serverscity.net/clientarea.php
[Tue Sep 18 22:15:50 2018] [warn] [client 94.54.128.73] mod_fcgid: can't apply process slot for /var/www/cgi-bin/cgi_wrapper/cgi_wrapper
[Tue Sep 18 22:17:40 2018] [error] [client 176.237.140.135] File does not exist: /var/www/vhosts/cp.serverscity.net/httpdocs/templates/default/images, referer: https://www.cp.serverscity.net/clientarea.php
[Tue Sep 18 22:21:48 2018] [error] [client 176.237.140.135] File does not exist: /var/www/vhosts/cp.serverscity.net/httpdocs/templates/default/images, referer: https://www.cp.serverscity.net/clientarea.php
[Tue Sep 18 22:33:15 2018] [error] [client 176.237.140.135] File does not exist: /var/www/vhosts/cp.serverscity.net/httpdocs/templates/default/images, referer: https://www.cp.serverscity.net/clientarea.php
[Tue Sep 18 22:34:22 2018] [error] [client 176.237.140.135] File does not exist: /var/www/vhosts/cp.serverscity.net/httpdocs/templates/default/images, referer: https://www.cp.serverscity.net/clientarea.php
[Tue Sep 18 22:35:34 2018] [error] [client 176.237.140.135] File does not exist: /var/www/vhosts/cp.serverscity.net/httpdocs/templates/default/images, referer: https://www.cp.serverscity.net/clientarea.php
[Tue Sep 18 22:38:39 2018] [error] [client 176.237.140.135] File does not exist: /var/www/vhosts/cp.serverscity.net/httpdocs/templates/default/images, referer: https://www.cp.serverscity.net/clientarea.php

 

[Martin.H]

This is not a Plesk problem, this problem is related to you clientarea.php & clientsservices.php

[Mon Sep 17 16:49:10 2018] [warn] [client 176.237.140.135] mod_fcgid: read data timeout in 250 seconds, referer: https://www.cp.serverscity.net/degidiaq/clientsservices.php?userid=882&id=2303

timeout 250 seconds. Start searching there.

Btw: a lot of paths/files are not existing, but all of these things are not related to Plesk..