Download/Setup Issues - Unable to Check for Anki Versions

I’ve just purchased a new laptop and am trying to download Anki.

At first, it was completely refusing to connect, with the below error:

I then used my phone as a hotspot, and was able to get the installer to launch, but am still unable to actually run it. I first got the below error:

And then when I tried to run the installer again, I got the below. Any advice would be appreciated!

Have you searched the forum for other recent posts with that same error (or same error code)?