Hmm, might have found a bug in the external client cfg for 0.13.0. One node is acting as egress, so AllowedIPs in the external client config is supposed to have a comma separated list right? The netmaker network, and the egressed network. It looks like an extra comma got it's way in there so the config doesn't work

AllowedIPs = 10.10.100.0/24,,192.168.1.0/24