Hi, I'm trying to try this playfab function but it gives me the error of "InvalidFacebookInstantGamesSignature (1396). This error is given to me in postman.
I also included an ajax call in my project but it also gives me an error.
Access to XMLHttpRequest at 'https://XXXX.playfabapi.com/Client/LoginWithFacebookInstantGamesId' from origin 'https://apps-334052124010569.apps.fbsbx.com' has been blocked by CORS policy: Request header field cache-control is not allowed by Access-Control-Allow-Headers in preflight response.
This is the code I use to get the Facebook Instant Games Signature