How can I troubleshoot OpenVPN Connect client connectivity?

If you are experiencing issues with the OpenVPN Connect Client not being able to establish a connection or losing connectivity, the article may help you: Troubleshooting Client VPN Tunnel Connectivity. It provides examples of common client connectivity issues with possible solutions and troubleshooting steps to help you solve client connectivity issues.
If you encounter a problem you cannot resolve, send us client logs and server logs with an explanation of your issue, and we’ll try to analyze the available information and provide you with possible remediation steps.

The troubleshooting page provides instructions on how to gather both client logs and server logs that can help determine issues with your OpenVPN Access Server.

Access Server Resources:
OpenVPN Access Server Documentation
OpenVPN Access Server Resource Center
OpenVPN Access Server Admin Manual