Fix for this issue is now available in the latest update of InDesign 2020 – that is, InDesign 15.0.1
In the Creative Cloud Desktop application, click on the Updates section on the left. You should be able to see the Update available for InDesign. Please update your InDesign application to this version to try out the fix.
Let us know in the comments section if you face any problem with the updation process.
Adobe InDesign Team
An error occurred while saving the commentJana Rekosh commented
When I package an InDesign file the process freezes as it attempts to make a PDF. I have to force-quit InDesign. The files are collected. Is there any way to turn-off the PDF portion of packaging?