Tesla needs to be able to speak to the car via the ethernet port. To do that, you need to configure the adapter settings. This was super easy back with older generations of Windows, but newer ones have ‘made things easier’ which brakes compatibility with Toolbox.
As such, please follow these directions exactly. Do not use the modern UI of the network settings! You’d think it should work as it’s “the same thing”, but no…
Click on the windows logo and type in ncpa.cpl and hit the Enter/Return button on your keyboard to open it.

This will open up the network connections submenu of the control panel where you will see your WiFi connector, possibly some VPN connectors but most importantly you should see an Ethernet connector. If your laptop does not have a physical Ethernet port, you will need to purchase and connect a USB or USB-C to Ethernet adapter so you can then see this connector in this window.

Right click the Ethernet adapter and select ‘Properties’

Select ‘Internet Protocol Version 4 (TCP/IPv4)’ and then click Properties

Next you will want to select ‘Use the following IP address:’ and input:
IP address: 192.168.90.125
Subnet mask: 255.255.255.0
Then click on ‘ok’ to close the window, and click on ‘ok’ again to close the next window.
Your IP address is now correctly set on your ethernet adapter.
