Nope, I used the website jailbreak where I installed the app directly on the device using safari. If you used the windows app try to set the date forward and see if the reboot/rejailbreak works for you.
I think that make the difference. The website one may come with a cert that valid for 1 year.
For those who use a unique Apple ID, the free developer account should only able to make a cert that valid for one week.
But anyway, good point, airplane mode on, and fast forward the date should able to test the validity.
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iPad Pros don't work on this jailbreak :/
I think it works, but the apps may disappear after start, that's makes the trouble. However, it's still actually jailbreak-able, just far from perfect / trouble free.