406 Not Acceptable

[OscarLate]

WooCommerce 5.0.0
WordPress 5.6.2

I have more than 15 WebSites in WooCommerce works, but one of them when I send ALL POST request give me a error ( 406 Not Acceptable).

If I send the request with Insomnia/Postman Works and with RestSharp Library but with httpWebRequest (WooCommerce.net) not.

P.S : The hosting said that mod_security are disabled

[OscarLate]

Well, I found solution.

I added in the Request Filter:
request.Accept = "*/*";