Hi,
Since the pie upgrade, my VPN clients stopped working on my Galaxy S9 (NordVPN, ExpressVPN, TurpoVPN). I uninstalled them all and re-installed only one at a time. During the configuration process, I'm shown a dialog box that says:
"Connection request
TurboVPN wants to set up a VPN connection that allows it to monitor network traffic. Only accept if you trust the source"
When I tap on "OK", nothing happens. It doesn't matter what VPN client I use, I get stuck at the same point.

I've changed the system settings to turn off all apps ability to "Appear on top" but no setting that I change works. Have reset the cache, nothing.

Welcome any suggestions

 

Tried re-installing VPN app several times, tried soft reset, tried hard reset. Nothing worked.