Error 619 – “A connection to the remote computer could not be established.”

1. If you have two or more VPN connections set up on your computer, ensure that only one is running and disconnect all other ones.

2. Check for any firewall and antivirus programs that may stop access to the VPN ports. Temporarily disable them to determine if they are the cause.

3. Try standard troubleshooting steps:

Reboot the computer
Delete and re-configure the VPN set up
Test the VPN on another computer/device on the same network. If it does not work, your network is stopping the VPN access.
Test the VPN on another network using the same device. If it does not work, your device has security software stopping the VPN access.