Error: When using --tun-ipv6, if you have more than one TAP-Windows adapter, you must also specify --dev-nodeExiting due to fatal error
That one can happen when you have multiple TAP-Windows adapters, most of the time because of another software using TAP. To fix it, open a command prompt (Shift+Right click) in your OpenVPN directory (where openvpn.exe is), and run:
openvpn.exe --show-adapters
This will list your TAP adapters. Then, open your ccrypto.ovpn configuration file with notepad and add this on a new line:
dev-node [name]
Replace [name] by your TAP adapter name.