OpenVPN failing to connect – failed to negotiate cipher with server

I couldn’t change the server config, and the ovpn file being used had:

cipher AES-256-GCM

# openvpn --version 
OpenVPN 2.6.0 x86_64-pc-linux-gnu [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [PKCS11] [MH/PKTINFO] [AEAD] [DCO]

From what I could see at https://github.com/OpenVPN/openvpn-gui/issues/381 I modified the ovpn file and changed the cipher AES-256-GCM line to

data-ciphers AES-256-GCM

Anonit