Instead of "Easy Flash," try using the iTunes Flash utility within 3uTools, as it uses different communication protocols that may bypass the error. Check Hardware & Connections:
: Older versions of the software may have bugs or compatibility issues with Apple's current server protocols.
To bypass or fix this error, follow these technical steps in order: Check Signing Status: Use a site like 3utools error unable to request shsh hot
3uTools defaults to "Hot" (cached) requests to save time. You need to force it to go live to Apple.
Sometimes, security software mistakenly blocks 3uTools from communicating with external servers. Instead of "Easy Flash," try using the iTunes
: Occasionally, Apple's servers are down or overloaded, preventing a successful request. How to Fix the Error
3uTools’ SHSH engine is sensitive to date/time formatting. You need to force it to go live to Apple
3uTools Error "Unable to Request SHSH": A Complete Guide to Fixing Flashing & Lifestyle Issues