OpenVPN refused to establish connection

i configured an open VPN server on my USA home network using a GL Inet router and downloaded the config file then upload it to my other GL from a different country. The USA server is running fine but the configuration file refused to set up on my client router form the other country. every time i run the filed then the VPN from the client router is down and i lost connection.

Please kindly advise what was missing on the configuration

Please don't double post.