Restart The App. The chances are pretty good that you’ve already attempted this step. Most people …
Troubleshoot Azure point-to-site connection problems Delete the old VPN client configuration files from C:\Users\UserName\AppData\Roaming\Microsoft\Network\Connections
What VPN client are you running? If it is a Cisco VPN then you might have a problem with the GUI being up and still runnig while you are trying to vpn from the other device.
Crosscheck that the VPN server deal with, the username, and password are right, comply with these steps: Click ‘Win + I’, choose ‘Network & Internet’ Click on ‘VPN’ showing within the right-side panel. This proper pane shows all of the Virtual Private Network choices. Click on your ‘VPN service’ and go to ‘Advanced Option Error 800 when trying to remote connect via VPN - Windows Jun 10, 2010
Giganews FAQ - VyprVPN Common Error Codes
How to Fix: Error 800 Windows 7 (L2TP over IP Sec Client Apr 01, 2020 VPN using hotspot with ios 10 not working - Apple Community Sep 26, 2016 Troubleshoot Azure point-to-site connection problems Delete the old VPN client configuration files from C:\Users\UserName\AppData\Roaming\Microsoft\Network\Connections