Failed to exploit device on 2.0.1a / Restore failed on 2.1

[estemomento]

Describe the bug
Failed to exploit device on 2.0.1a / Restore failed on 2.1

What is your macOS version?
macOS 11.4 on Intel

What is the device you're trying to downgrade?
iPhone 5s

What is the LeetDown version you're using?
2.0.1a & 2.1

**Enable debugging in LeetDown's settings and copy and paste LDLog.txt here. **

• on 2.0.1a: Running checkm8 exploit => failed, please re-enter dfu
• on 2.1:

[+]  Sucessfully sent /dev/null
[+]  5 second cooldown, re-plug now if needed on Apple Silicon
[+]  sendFile() is attempting to connect
[+]  Sucessfully sent /var/folders/_z/k45qm7ls2sz1ffq5fggqpk3m0000gn/T/iPSW/Firmware/DFU/iBSS.ipad4b.RELEASE.im4p
[+]  5 second cooldown, re-plug now if needed on Apple Silicon
[+]  sendFile() is attempting to connect
[+]  Sucessfully sent /var/folders/_z/k45qm7ls2sz1ffq5fggqpk3m0000gn/T/iPSW/Firmware/DFU/iBEC.ipad4b.RELEASE.im4p
[+]  5 second cooldown, re-plug now if needed on Apple Silicon

Additional info (optional)