The issue reported is at Apple’s end.
Hence, Apple is recommending to update macOS to 10.15.x version in order to resolve this issue.
Please update your macOS to Catalina. If you still face this issue in macOS 10.15 do add your comment in this thread.
Adobe InDesign team
An error occurred while saving the commentG commented
Started happening when I upgraded from my 2013 Mac Mini to the 2018.G supported this idea ·