Does anyone know how to fix this problem while trying to join the EA Play test flight?

I have the same problem, Whenever i try host or join the game. It tells me the error to fix my NAT, but I checked my router, and NAT is open already, so I did the test again, and it tells me about Matchmaking : service alert but i don't get it. Does anyone
know how to fix this problem??? Or is it the xboxlive updating to fix the matchmaking? Tell me if this problem fixed, and I will do that. Thanks.

Hello,

Thanks for taking the time to share about the problem with Microsoft Flight Simulator.

Based on the information you have shared, we understand that you are playing Microsoft Flight Simulator, and since your concern is posted in the wrong category "Windows 10/Gaming", we will be moving this thread to the correct category "Game issues", where moderators in the corresponding category will assist you further on your concern.

Thanks for your patience and understanding.

Best Regards,

| Microsoft Community Support Specialist

Does anyone know how to fix the problem when it say's "The game couldn't start. Try downloading the game again."?

Hey Go on Motion,

Thank
you for letting us know that the issue has been fixed. We'll be locking the thread as the issue has been resolved. If you require any help with any other issues, please feel free to come back to the Xbox Forums for further assistance. If anyone needs assistance
with this issue or any other issues, we suggest creating a new thread.

Thank you
again and have a great day
Go on Motion!

I got it too. Hold the power button for 10 seconds to power cycle. Probably will need a patch from Xbox.