https://wccftech.com/emergency-windows-10-update-kb5004476-fixes-xbox-game-pass-issue-0x80073d26/

Microsoft has released an emergency update for devices running Windows 10 versions 2004, 20H2, and the latest version 21H1. This out-of-band update brings an expedited resolution that addresses an issue preventing installing or opening Xbox Game Pass games on some affected devices.

"When you try to install or start an Xbox Game Pass game on your Windows 10 device, you may be redirected to the Microsoft Store page for Gaming Services," the support document explains. "Additionally, you receive error 0x80073D26 or 0x8007139F."