The issue has been fixed with Apple’s MacOS High Sierra 10.13.4 Beta (17E139).
You can try out the fix by updating your machine to the beta update from Apple.
Let us know if the issue is fixed for you after aforementioned High Sierra beta update.
An error occurred while saving the commentZach commented
might as well add me to the list of "unable to package" after upgrading.
I should have waited till next year to upgrade to High Sierra.