Hello,

Here what I've done to make it work:

Open Start on Windows 10.

Search for Command Prompt, right-click the top result, and select Run as administrator.

Type the following command to enable the built-in Administrator account and press Enter:

net user "Administrator" /active:yes

Open Start on Windows 10.

Click on your user. Sign out or select administrator.

Game works now.

So this is really a set of permissions of some kind on the folders. Even though my current account is an administrator. This is really weird.