OpenVPN - "Waiting for TUN/TAP interface to come up..."
August 5, 2022
When using OpenVPN on Windows, we periodically experienced the error "Waiting for TUN/TAP interface to come up...". Sometimes a reboot solved the problem. OpenVPN's documentation suggested to reset the TCP/IP stack which worked, but reset the settings for all our network adapters, and did not permanently solve the problem.
The fix we found was:
1) Navigate to Network Connections.
2) Right-click the TAP-Windows Adapter and choose Properties.
3) From the list of protocols, uncheck anything you don't need. This connection only uses TCP/IPv4 so nothing else in our list is checked.
After correcting this, the VPN worked properly.
January 26, 2023
It worked! You saved my life.