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 commentDon Cline commented
I have run into this issue, also. The warning I receive is that InDesign is unable to access the server on which the file I am attempting to package resides.