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It can be resolved by updating to 10.5.7 (or later), or using a USB hub.Occurs when trying to install an old firmware and Apple's server disallows the installation.
If all goes well you will see nothing but a black screen. Start greenpois0n and press ‘Jailbreak’ Once greenpois0n has finished its thing. This is likely because you did not have the TSS server running OR you updated without Tiny Umbrella OR you are working with a device OTHER than i Phone 4.
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If you do not have these saved already, it is too late to save them as Apple no longer signs i OS 11.1.2.
You should always save SHSH2 blobs for every i OS version.
Check the USB connection and try other direct ports or maybe the USB cable is an older one. Reportedly happens during failed downgrade attempts, Some have seen success afterwards by doing the downgrade from DFU mode instead of the normal Recovery mode.