We use some hardcoded IP addresses as part of our InvizBox Go setup. If your local network uses those IP addresses, your InvizBox Go will fail to work properly.
We use the 10.153.146.x (x from 1 to 255) for our DHCP addressing. If this overlaps with your local router DHCP range, it will lead to trouble.
As part of the internal routing to Tor services (such as the autoupdate feature), we use the 172.16.1.1 IP address. If this overlaps with your local router DHCP range, your InvizBox Go will look like it connects to VPN successfully and then fails.
The solution here is to change the range you use on your router.