How to fix the problem is OpenVPN?

How to fix the problem in OpenVPN?
Tue May 15 13:40:06 2018 TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity)
Tue May 15 13:40:06 2018 TLS Error: TLS handshake failed
June 5th 19 at 22:03

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