The issue has been fixed with Apple’s MacOS High Sierra 10.13.4 Beta (17E139).
You can try out the fix by updating your machine to the beta update from Apple.
Let us know if the issue is fixed for you after aforementioned High Sierra beta update.
An error occurred while saving the commentKaren MacDonald commented
When I go to package a file (running El Capitan), the package file window is extremely wide. I have to scroll back and forth just to click "Package" on the bottom right. It won't let me drag the edge of the window to reduce the width. Am I missing something? Have searched in InDesign, online, no luck.