The exploit is a race condition that requires precise timing and several other conditions to be met for it to trigger successfully. As such it can take a while for that to happen.
Which means that, sometimes, you run the code but it simply fails. When it happens, you can turn off the console and try again.
Quoting from the GitHub’s page:
Which means that, sometimes, you run the code but it simply fails. When it happens, you can turn off the console and try again.
Oh, ok. That makes sense.