To test your BI phone ap I have a test user set up. Select add new user and enter E3J4K3TVP2 IN THE key BOX, 192.168.1.84:82 for LAN, 100.70.175.36:82 for WAN.
User name is remotetest and password is remotetest.
To test your BI PC, use a browser and enter the above WAN and it should pop up with a login screen where you can enter the same name/password there.
Let me know which one works.
(Note that Tailscale must be on on your devices)