Fix for this issue is now available in the latest update of InDesign 2020 – that is, InDesign 15.1.2
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 still face this problem.
Adobe InDesign TeamDan Waisley supported this idea ·
An error occurred while saving the commentDan Waisley commented
Our University Marketing team can also confirm this occurring on Mac machines to both a Linux SMB file server (Dell Isolon) and to a Windows SMB file share.