How to Fix Error Unable to Request SHSH on 3uTools When Topping

How to Fix "Unable to Request SHSH" Error in 3uTools  The "Unable to Request SHSH" error (often occurring at the 9% mark during flashing) typically means 3uTools cannot communicate with Apple’s servers or the firmware you are trying to install is no longer authorized by Apple.  Why This Happens 

: Use an original Apple MFi-certified lightning/USB-C cable.

A. Normal detection

to an older iOS version that is no longer signed, the request will fail because Apple's servers will not issue the necessary certificate. Check sites like