When importing the configuration file to the OpenVPN app, it may has a
reminder as below, please click CONTINUE as the certificate is already
included in the configuration file.
There are several common reasons cause failed:
• The Internet Service Provider doesn't assign you a public IP
address, please check here.
• You may need setup port forwarding, please check here.
• The port you are using for OpenVPN Server is blocked by the
Internet Service Provider, change to another port, or contact the
Internet Service Provider.
• Some countries/regions may block the VPN connection.