All Possible Errors are usually displayed in the connection log. You can get the log as follows:
Right click on the OpenVPN icon in the tray (next to the clock)? The server you are trying to connect to ? View Log
The error "All TAP-Win adapters on this system are currently in use" can occur for the following reasons:
Trying to connect to 2 servers at the same time.
In this case, do not forget to disconnect from the previous server before choosing a new one.
Also, do not use simultaneously with other VPN providers.
Virtual adapter crashes or freezes.
To solve, go to Programs\TAP-Windows (or Programs\OpenVPN\Utilities for older versions of programs):
- Delete ALL TAP virtual ethernet adapters
- Add a new TAP virtual ethernet adapter
If the problem persists, reinstall the OpenVPN GUI.
Write to support