the problem is solved through adding your own code into google php
though i cannot give the code now due to security reasons , here’s the solution:
resolve your VPN service to a local host like 127.0.0.1 which should be resolved from localhost
now try editing the google site kit php and insert the php code to guide all internet service to the host(HTTP HTTPS FTP)
that should solve the problem
I’ve comment on the post on Github
best regards