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 commentArmand Parvazi commented
Same issue. It didn't start occurring until I upgraded to a 4K monitor. Occurs only on monitor that InDesign is on, but not on both when running dual. If running only one of the monitors, it occurs on that monitor.
macOS High Sierra 10.13.5
MacBook Pro 13" Retina (early 2015)
2.9 GHz Intel Core i5
16 GB 1867 MHz DDR3
Intel Iris Graphics 6100 1536 MB
Running dual LG 27UD58-B monitors