Cannot network boot with the downloaded image file

Symptom

Booting from the image specified in the URL fails.

Solution 1
Cause

The image is not signed and Secure Boot is enabled.

Action
  1. Ensure that the image is signed and that its Secure Boot settings are correct. Ensure that the image is signed and that its Secure Boot settings are correct. .
  2. Try to download the file in the URL again.
Solution 2
Cause

The downloaded file is corrupt.

Action
  1. Select a new file.
  2. Repeat the URL configuration, specifying the new file.
  3. Try to download the new file in the URL.