Thanks for the screenshots! They help us with the mysteries faster.
Currently, on both of your devices, there is No Solution status. This means that none of them see the satellites. This way, base indeed sends nothing: it sees nothing. As the stream is not established, you get errors with the caster.
So to get a fuller idea here, I’d suggest going outside and establishing at least Single on both devices. This way, when you connect both units to the Internet, we will at least be sure that the base sends the corrections.
Also, I deleted the screens with your caster details. They helped a lot! But these are your personal credentials, it’s usually better to keep them private.