How to manage your cloud gaming saves and storage to fix some loading issues

There is a 50GB storage cap for xCloud users, which could prevent you from loading the sim if you download too much additional content. 

To manage your inventory, open cloud gaming storage management.

1. Go to xbox.com/play and sign in with your Microsoft account.
2. Select the Settings icon.
3. Select the Manage games tab.
4. You’ll see a list of all games you’ve played through cloud gaming over the last 30 days. If the list is blank or you don’t see the game title you’re looking for, launch that game, exit the game and wait 1-2 minutes, and then return to the Manage games tab to see a repopulated list of game titles.
5. Select Microsoft Flight Simulator
6. Delete some or all storage items, then try launching the sim again.