After researching forums like r/LegacyJailbreak and Reddit’s r/jailbreak, the consensus is that Error 1034 on an iPad 4 is tied to three primary causes:
On the freshly restored iPad:
The iPad 4 (iPad3,4 – 3,6) is the last device with the 32-bit A6X chip. Apple’s final update for it was iOS 10.3.4 (released in 2019, mainly for GPS rollover fix). Jailbreaking 10.3.4 on 32-bit devices is challenging because most modern tools target 64-bit. ipad 4 jailbreak 1034