404 error whmcs wordpress integration + nginx

Hello, good morning,

I installed the plugin according to the letter the manual, when I access "https://www.estudiseno.com/zona/cliente" everything works but when I want to access "https://www.estudiseno.com/zona/client/clientarea.php "gives me a 404 error.
Do not know if you will have to do with nginx rewrite rules or why.

Thanks in advance.

sorry my english is bad.