OpenVPN stopped working with latest firmware

After upgrading to 2.27 OpenVPN has stopped working!
I get
'RESOLVE: Cannot resolve host address: (Try again)
RESOLVE: Cannot resolve host address: (Try again)
Could not determine IPv4/IPv6 protocol
SIGUSR1[soft,init_instance] received, process restarting
Restart pause, 80 second(s)

This was working perfectly before the upgraded firmware!

Do you confirm wether the router can access Internet? It seems that the router can’t access Internet.

Yes, it couldn’t see the internet.
I have done a ‘factory’ reset and now everything is all OK and I have VPN back again, thanks.