We're happy to announce that the fix for this issue is now available in the latest update of InDesign - version 17.2 that is available to download from Creative Cloud Desktop application.
Please update to this latest InDesign version to get the fix.
Adobe InDesign team
An error occurred while saving the commentMeredith Hoenes commented
I am using InDesign 2020 and this has done this to me for the 1st time. None of the suggestions are fixing the issue. I am on a MAC - Catalina 10.15.4