Issue after putting device in DFU

[Spec94v6]

iPhone 6. iOS 10.1. after running "./sshrd.sh 10.1" i get

main:starting
getting get_sigcheck_patch() patch
main: Error doing patch_rsa_check()! (memmem failed to find needle)
[-] An error occured

i then tried "./sshrd.sh 12.5.7"

got to the boot step, booted ramdisk, ran ssh command, then in "localhost:~ root#" i ran "./sshrd.sh reset" to wipe the device, and i get
-sh: sudo: command not found

help. gets stuck on 10.1, if i try it on a newer version it boots and works for a bit, but then none of the given commands work, and give the above message.