The fix for this issue is now available in the latest update of InDesign – that is, InDesign 15.0.2.
Please update your InDesign application to get this fix.
Adobe InDesign team
An error occurred while saving the commentUlf-Ger commented
we have the 15.0.1 version installed and also tested without a positive result. In principle, our problem is comparable to that of Vladan, see also the link of Uwe Laubender.