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 commentNathalie commented
Experiencing the same issues. Unable to package any files to the server since Nov 2017. Need to copy to my files to the desktop and then package, only to save back to the server. Cannot believe one has to be inconvenienced like this when paying for software that does not come cheap. It's 2018, for goodness sake fix the problem!!