I had a similar issue on my AC 68U and rather than banging my head I just used the default function to reset Openvpn..go to the details tab of vpn and on each instance of the server hit the default button at the bottom...restart router and hopefully it fixes the issue like it did for me. PIA as you have to send the new opvn file you created to each device but better than spending days figuring out why in my case...good luck.On my AC-88U now I can't export properly .ovpn profileSome certs missing, had tried add them manually to profile - not working.
Oct 21 00:03:43 openvpn[1867]: OpenVPN 2.4.4 arm-unknown-linux-gnu [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [MH/PKTINFO] [AEAD] built on Oct 17 2017
Oct 21 00:03:43 openvpn[1867]: library versions: OpenSSL 1.0.2j 26 Sep 2016, LZO 2.08
Oct 21 00:03:43 openvpn[1868]: PLUGIN_INIT: POST /usr/lib/openvpn-plugin-auth-pam.so '[/usr/lib/openvpn-plugin-auth-pam.so] [openvpn]' intercepted=PLUGIN_AUTH_USER_PASS_VERIFY
Oct 21 00:03:43 openvpn[1868]: Diffie-Hellman initialized with 2048 bit key
Oct 21 00:03:43 openvpn[1868]: Insufficient key material or header text not found in file 'static.key' (0/128/256 bytes found/min/max)
Oct 21 00:03:43 openvpn[1868]: Exiting due to fatal error
openvpn --genkey --secret ta.key
Welcome To SNBForums
SNBForums is a community for anyone who wants to learn about or discuss the latest in wireless routers, network storage and the ins and outs of building and maintaining a small network.
If you'd like to post a question, simply register and have at it!
While you're at it, please check out SmallNetBuilder for product reviews and our famous Router Charts, Ranker and plenty more!