Error 0x803F8001 is most commonly attributed to a game permissions problem or missing updates on your computer.
How do I fix error 0x803f8001?
The error 0x803f8001 usually occurs when you try to download a new app from the Microsoft Store. To correct the error, press the [Win] + [R] keys on your keyboard simultaneously, enter “WSReset” and confirm with [Return]. This should reset the Microsoft Store cache and make the app easy to install.
Why is the Minecraft launcher not available in your account 0x803f8001?
Fix 1: Update your Windows system Therefore, when you find the Minecraft Launcher error 0x803f8001 appears, you can try to update your windows system first. Press the Windows logo key and I key on the keyboard at the same time to Open Settings. Click the Update & Security from the menu options.