OpenVPN Support Forum

Hi, newbie to the forum sorry. I successfully set up OpenVPN connect on my iPhone and old iPad to access my synology NAS. I also am able to connect via my mac using Tunnelblick. Unfortunately I have just got a new iPad, imported my .opvn and ca.crt files via iTunes and I find that "no certificates are present in the Keychain" so I can't connect to my server. I have tried embedding the certificate in the OPVN file as suggested on the help file in the app but still no luck. I see this was a problem for people back in 2013 but presumably a different issue then, does this stem from an iOS update? Is there something I have forgotten to do?

Thanks in advance