What is the First Thing to Check when Troubleshooting VPN Problems?

VPN Troubleshooting Guide – Fix VPN Problems

Restart the VPN Software.
Clear your Device of Old VPN Software.
Make Use of the VPNs Help Function.
Make Sure Your VPN is Up To Date.
Change the VPN Server.
Connect Using a Different VPN Protocol.
Check Your Firewall.
Try the OpenVPN Client Instead.