The installer retrieves information required to install AES over the Internet. Some of that information seems to have been corrupted in transit.
Restore Internet connectivity. Perhaps there is a web proxy interfering with access to the Internet.
curl -ISsf https://www.getambassador.io/to verify that your computer can reach important websites. Successfully reaching the Internet will show something likeHTTP/2 200cache-control: public, max-age=0, must-revalidatecontent-length: 0content-type: text/html; charset=UTF-8[...]
The exact results are not important as long as "200" shows up as the return code in the first line, which it does in this example.
A result that looks likecurl: (7) Failed to connect to 188.8.131.52 port 443: Network is unreachable
indicates that there is something preventing you from reaching the Internet.
Run the installer again:edgectl install
Don't worry: it is safe to run the installer repeatedly on a Kubernetes cluster.