Error: Exploit Failed -31

[teckgeneration]

Tell us about your setup:

1. What iDevice are you using? Ipad Air
2. On what version of iOS is it? 12
3. What version of checkra1n are you using? 0.12.4
4. What is your host system (OS version? Hackintosh? VM? etc.)? Lenovo 330
5. How are you connecting to the device (USB-A? USB-C? Apple/3rd party cable? Through a USB hub?)? USB apple

What are the steps to reproduce the issue?

1. Connect the iPhone to the computer via USB.
2. Boot the computer from the USB drive containing Checkra1n.
3. Follow the on-screen instructions to initiate the jailbreak process.

What do you expect, and what is happening instead?
I expect the jailbreak process to complete successfully, allowing me to bypass the iCloud activation lock on the iPhone. However, instead, I encounter the "checkra1n exploit failed" error with code -31.

**Did you see a popup on the device stating it entered "Safe Mode" due to an error?
No, I did not see any popup indicating that the device entered Safe Mode.

Does the issue also occur if you tick "Safe Mode" in the checkra1n options?
Yes, the issue persists even if I tick "Safe Mode" in the checkra1n options.

Any other info, error logs, screenshots, ...?
I have tried multiple troubleshooting steps, including restarting both the device and the computer, using different USB ports and cables, reinstalling Checkra1n, and verifying compatibility with my device model. However, none of these steps have resolved the issue.