nGINX rewrite rules for whmcs 8

whmcs-nginx-include-rules.conf

	location ~ /clients/admin/(client!\.php|client/(.*)|table/(.*)|search!\.php|search/(.*)|apps|billing|setup|user|services|addons|domains|utilitiesemailmarketer!\.php|utilities/(.*)|logs|help!\.php|help/license|modules|image/(recent|upload)|validation_com/(.*))/?(.*)$ {
		rewrite ^/(.*)$ /clients/admin/index.php?rp=/admin/$1/$2;
	}

	location ~ /clients/(images/em|invoice|domain|login|invite|password|account|store|download|knowledgebase|announcements|clientarea/ssl-certificates|user/(verification|accounts|profile|password|security|verify)|cart/(domain/renew)|domain/pricing|cart/order|images/kb)/?(.*)$ {
                rewrite ^/(.*)$ /clients/index.php?rp=/$1/$2;
	}
	
	location ~ /clients/auth/manage/client/links/?(.*)$ {
        rewrite ^/(.*)$ /clients/index.php?rp=/auth/manage/client/links$1;
   	}
	
	location ^~ /clients/vendor/ {
	        deny all;
		return 403;
	}

@xyzulu in your experience, which web server is most performant with WHMCS?

I've used all of them.. performance is about the same..

We want to install our WHMCS on our VPS. In VPS, we use Aapanel Software to operate our VPS. I installed all required PHP extensions, and I also use Nginx and PHP 8.1. But the Problem is that when I open my domain where I hosted WHMCS the first page is coming like "

Welcome to WHMCS!

Before you can begin using WHMCS, you need to perform the installation procedure. Click here to begin..."

And after I click on click here to begin they show

"Oops!

Something went wrong and we couldn't process your request.

Please go back to the previous page and try again."

I also tried Apache instead of ,NGINX but same problem every time. Please guide me the best approach to use whmcs in vps.

Please guide me the best approach to use whmcs in vps.

Perhaps you should be contacting WHMCS for this kind of help.

This is my WHMCS block for nginx , tested on WHMCS 8.13.1 (replace /billing with the name of your whmcs folder).
WHMCS support send me to this gist, as always the answer is "we do not support nginx and we have no documentation for it".

location ^~ /billing/vendor/ { deny all; return 403; }
location ^~ /billing/assets/ { try_files $uri $uri/ =404; }
location ^~ /billing/templates/ { try_files $uri $uri/ =404; }
location ^~ /billing/images/ { try_files $uri $uri/ =404; }
location ~ ^/billing/modules {
    try_files $uri $uri/ =404;
    include nginxconfig.io/php_fastcgi.conf;
    fastcgi_pass unix:/var/opt/remi/php83/run/php-fpm/highproxies.sock;
}
# This is your universal catch-all for friendly URLs
location /billing/ {
    try_files $uri $uri/ /billing/index.php?$query_string;
}
# Admin area rewrite (for REST-style URLs)
location ~ ^/billing/admin/(client!\.php|client/.*|table/.*|search!\.php|search/.*|apps|billing|setup|user|services|addons|account/.*|domains|utilitiesemailmarketer!\.php|utilities/.*|logs|help!\.php|help/license|modules|image/(recent|upload)|validation_com/.*)/?(.*)$ {
    rewrite ^/.*$ /billing/admin/index.php?rp=/admin/$1/$2 last;
}
# Client area friendly URLs
location ~ ^/billing/(invite|images/em|invoice|login|password|account|store|download|knowledgebase|announcements|clientarea/ssl-certificates|user/(verification|accounts|profile|password|security|verify)|cart/(domain/renew)|domain/pricing|cart/order|paypal_acdc|paypal_ppcpv|paypal|cryptomusgateway)/?(.*)$ {
    rewrite ^/.*$ /billing/index.php?rp=/$1/$2 last;
}