I tried them all and none had the desired result. I ended up copying a registry key from a user that desktop changing worked on, into my own registry which now works for me. I added the new folder/Key “Personalization” to

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Personalization

then added the new folder/Key “Settings”

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Personalization\Settings

then added the new QWORD (64-bit) Value. Value name: AcceptedPrivacyPolicy Value data: 0 Base: Hexadecimal

Now I’ve got my changeable wallpaper back. Woot.