Hello,
Welcome to Microsoft Q&A!
I'm sorry to say that currently, we can't offer more help with VPN. For the VPN issue, Tt needs more professional support. I suggest that you might need to open a support ticket for this. Please contact our paid phone support at MS Support. You will get 1:1 support on that. Choose Developer Tools-> Windows UWP Development-> Windows 10 Universal App Dev and pick the topic you want to ask. Please kindly note that your support ticket will be free if it is Microsoft's issue.
Thank you.