can't configure mikrotik as openvpn client, could not negotiate tls in time

Hi,
I’m new to Mikrotik. I have a Map2n device which I want to use it as an OpenVPN client, I followed tutorial here but I can’t connect to OpenVPN server,
Here is the log output:

19:24:33 ovpn,info OpenVPN: initializing... 
19:24:33 ovpn,info OpenVPN: connecting... 
19:25:34 ovpn,info OpenVPN: terminating... - could not neg
19:25:34 ovpn,info OpenVPN: disconnected

How can I solve this?