x-faustwp-secret headers is not authorized

[mathieuCatapulpe]

Hey so I have this error message when I try to access previews front my Nuxt app x-faustwp-secret headers is not authorized .

When I bypass using an extension (such as this one for instance https://addons.mozilla.org/fr/firefox/addon/cors-everywhere/ ) everything works perfectly

So I think for some reason my cors are getting ignored, in my wordpress theme I added :

function add_cors_http_header(){
    header("Access-Control-Allow-Headers: * , x-faustwp-secret"); // also tried without the *
    header("Access-Control-Allow-Origin: *");
}
add_action( 'send_headers', 'add_cors_http_header' );

I even tried to add the headers directly in .htaccess file using :

<IfModule mod_headers.c>
	Header set Access-Control-Allow-Headers "* , x-faustwp-secret"
 </IfModule>

Does anyone know where it might come from or encountered this issue ? I contacted the support from my web server but they couldn't help.