Grounded won't launch at all on xbox game pass PC

[ToothlessGumpa]

so my friend can't even launch the game. we have tried every fix we can find on the internet. he has even gone into his firewall and made exceptions. he has gone into the command prompts and tried to fix the teredo issue with xbox live content. He has updated his direct x 12 and also uninstalled and reinstalled it. he has also updated his graphics card. All of this to no avail. is there anything y'all can think of to do to get this working. we are super excited about this game and really want to play together.