Cannot access my Gateway at 192.168.12.1

After a lot of investigation, I uninstalled the VPN and I can now access my gateway 192.168.12.xx

iTinkeralot wrote:

My guess is that he plugged a router into the T-Mobile router, as you speculated, and it served the 192.168.12.1 DNS server up on its ethernet segment as the DNS server. No way clients on the second broadcast domain can ever be routed out and back as the T-Mobile router will never know of the ethernet segment on the other side of the other router. In effect he needs to turn that to bridge mode and disable the DHCP server or just shut the old router down. Unless there is a demand for expansion of the wireless to try to cover more area the best solution is to just go with the T-Mobile router. The second router would have the double NAT solution and well that could cause issues as well. 

My TMHI Gateway is the router, it is an integral part of a single “box”