[MCL-15229] MC Dungeons Launcher is unable to "verify what products you own"

Mojang Studios Note

This should now have been fixed. It was caused by expired Xbox tokens which was not properly refreshing. If you are still experiencing this issue please report a new bug.

Potential Workaround

Sign out of your Microsoft account on the launcher and sign back in. If this doesn't fix it do the following: Uninstall the game via your PC's "Control Panel" by going to "Programs and Features", and reinstall the launcher and game via https://www.minecraftdungeons.net/en-us/download/
Note: This should not delete your characters. However, in case you're running an older version, you can backup your saves before reinstalling.

The bug:
Upon starting the launcher, the launcher will state that it is unable to verify what products/DLC you own and to check your internet connection (the connection is fine). The game is still able to start and any DLC content you own will be usable in-game.

How to reproduce:
1. Start up the launcher
2. The launcher will state that it cannot verify what products you own.