Before fixing the problem, you need to understand its root cause. The phrase "when new" is the clue here. The error occurs for three primary reasons when a device or iOS version is brand new:
SHSH blobs were the digital signatures Apple used to approve iOS installations. Without them, Alex could not downgrade or restore the phone to the specific firmware needed for the jailbreak. 3uTools, usually a flawless software for this task, was failing. Frustrated, Alex rubbed his eyes and began to troubleshoot. 🛑 Step 1: The Server Block how to fix error unable to request shsh on 3utools when new
http://appldnld.apple.com (default) or try Cydia’s.