VPN Certificate errors

I have a nighthawk r7000p and am trying to implement a VPN, the Firmware Version is
V1.3.1.44_10.1.23 .  I've gotten past several easy error but am having problems authenticating using certificates.  The error that I am receiving is

 

Tue Nov 13 13:45:34 2018 us=360087 Certificate does not have key usage extension
Tue Nov 13 13:45:34 2018 us=360087 VERIFY KU ERROR
Tue Nov 13 13:45:34 2018 us=361086 OpenSSL: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed
Tue Nov 13 13:45:34 2018 us=361086 TLS_ERROR: BIO read tls_read_plaintext error
Tue Nov 13 13:45:34 2018 us=361086 TLS Error: TLS object -> incoming plaintext read error
Tue Nov 13 13:45:34 2018 us=361086 TLS Error: TLS handshake failed

 

I have doenloaded the OpenVpn Client, for Windows, via the link supplied, I have included the configuration file

 

 

Help would be greatly appreciated