Explore Command (Windows Key + E)
Right Click on "This PC", and select "Manage"
Once Computer Management Opens, click "Device Manager"
Under Network Adapters, uninstall all adapters starting with "WAN Miniport" - Right click, Uninstall
Once you've uninstalled all, go to the menu and select "Scan for Hardware Changes" and those adapters will reinstall automatically without restarting.
Now your VPN should work properly. I've run into this twice after clean installs of Windows 10 and after resetting the LAN network adapter.
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