To fix the "Unable to request SHSH" error in 3uTools (often occurring around 9% during the flashing process), you generally need to
If 3uTools shows "Unable to request SHSH" or becomes stuck at the top while requesting SHSH blobs, follow these steps: how to fix error unable to request shsh on 3utools when top
Note: SHSH requests require the device to be in a state where it can provide ECID and device info — Recovery or normal boot are best. To fix the "Unable to request SHSH" error
“Unable to request SHSH” in 3uTools usually means the software failed to fetch SHSH blobs from Apple’s servers or from Cydia / local cache.
When you choose “Top” (i.e., the latest signed iOS version for your device), the error often occurs if: With your device connected, open 3uTools
Here is a step-by-step guide to fixing this error.
Look at the firmware download section in 3uTools or check a status site like IPSW.me.