If you have a subtree of entries with :ID: properties and call M-x
`org-clone-subtree-with-time-shift' on it, an error occurs:
Wrong type argument: stringp, nil
This is due to the interaction of
`org-clone-subtree-with-time-shift' and `org-id-add-location'.
When the former is called, it
Remember to cover the basics, that is, what you expected to happen and
what in fact did happen. You don't know how to make a good report? See
https://orgmode.org/manual/Feedback.html#Feedback
Your bug report will be posted to the Org mailing list.
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