Unable to download game after joining a preview

I hadn't joined the program, I had downloaded the app and was unable to open it. It was after this that the issue occurred.

Being invited is not enough. After a friend invites you, the application goes to the preview team. Once they approve you, they send you a code to download the app.

If you redeemed the code and the download did not start automatically, head to My Games & Apps > Apps and scroll to the far right and a grey pane will populate with tiles. One of them should be the Preview Dashboard App. Click A to download, then open it
and follow the steps to join the preview.

I too am getting this error. After opting out of the preview program I downloaded 2 updates. On around 350MB and another around 3.5GB. After downloading the update party chat, game invites and messages are not showing up as notifications. So I cannot join
any games when people send an invitation to play. Has anyone found a solution?

Hello,

Currently, Ark: Survival Evolved is part of Xbox Games Preview, which means that the game can only be downloaded in regions in which the Games Preview programme is available. Unfortunately, Games Preview is currently unavailable in the Netherlands, so you
will be unable to download Ark until either Games Preview comes to NL or Ark is released as a full game.

Sorry about this. I know this won't be the answer you wanted to hear.

That's a preview and it's available for insiders, there's a process to register as insider to get access to it

"To get started, download the Xbox Insider app from the Microsoft Store on Windows. After signing into the app with your Microsoft account navigate to the Previews tab and join the PC Game Pass Southeast Asia Market Expansion preview. Wait for the registration to complete and you’re good to go! Now that you’re in the preview launch the Xbox app which can be found in the Microsoft Store on Windows if it’s not already installed. Sign into the Xbox app with the same Microsoft account that you used to join the PC Game Pass Southeast Asia Market Expansion preview and then subscribe to PC Game Pass from within the Xbox app. After signing up for the service you’re ready to start downloading and playing games from the library! As you start to play games and explore the Xbox app, please help us improve the experience by submitting feedback. To submit feedback, click on the user icon in the top right of the Xbox app and select Feedback from the dropdown."