I was getting error code 0x03F8001 on Microsoft Mahjong and Taptiles. I tried uninstalling Taptiles and got response it couldn't do it...error code 0x8000000e. It finally did uninstall but when I tried to reinstall it wouldn't and gave same error code.
I'm 65 and techno stupid. I tried the virtual agent, kept searching support, answers, etc, etc. Finally came across your link to the Windows Store Diagnostic App. Downloaded, found it (amazing for me) and ran it.
Taptiles reinstalled no problem and both games played perfectly.
Many, many thanks