I am also having trouble connecting to the VPN on OSX. I applied what @k0m4ndo posted on 4/27, as well as what @4rt3ry posted on 6/22. @4rt3ry's edit is true to where the relevant file is for me, but now I get this error:
1565799266.589525 9100 Options error: --up script fails with '/etc/resolv.conf': Operation not permitted (errno=1)
1565799266.589617 b000 Options error: Please correct this error.
When I added what @k0m4ndo posted, I see this in regards to the last two lines:
Warning: Tunnelblick is using 'openvpn-down-root.so', so the route-pre-down script will not be used. You can override this by providing a custom route-pre-down script (which may be a copy of Tunnelblick's standard route-pre-down script) in a Tunnelblick VPN Configuration. However, that script will not be executed as root unless the 'user' and 'group' options are removed from the OpenVPN configuration file. If the 'user' and 'group' options are removed, then you don't need to use a custom route-pre-down script.