I have the invitation for the flight 3 but the insider program is not in the launcher. also i am getting an access denied error when i try and go to this url
So i am writing the issue here
This support forum is for help with Xbox MCC at this time. If you can see MCC in the launcher and can’t log into the support site, it means that you are not logged in with the correct details. Mare sure you are using the same account you used to sign up for the Insiders program