I have this issue also, "The file is damaged and cannot be opened - Error code 4". Restarting InDesign helps, but it's so ANNOYING. Also scared the hell out of me the first time it happened.
My Specs:
MacBook Pro (Retina, 15-inch, Mid 2015)
16GB Ram
Mac OS High Sierra 10.13.1
InDesign 13.0.1
I have this issue also, "The file is damaged and cannot be opened - Error code 4". Restarting InDesign helps, but it's so ANNOYING. Also scared the hell out of me the first time it happened.
My Specs:
MacBook Pro (Retina, 15-inch, Mid 2015)
16GB Ram
Mac OS High Sierra 10.13.1
InDesign 13.0.1
I have trashed preferences, before anyone asks...