This issue has been fixed.
Adobe InDesign team
An error occurred while saving the commentJef Vingerhoets commented
Same problem here. When trying to save a random document, the error appears.
After that, I'm not able to open or save any other docs.
Restarting Indesign does the trick, but it is safe to say that this is not how it should work.
Is there a solution?
Macbook Pro (Retina, 15-inch, Mid 2015)
High Sierra 10.13.2