Workout won't Save - Error message

Hi All,
I am new here. I tried creating my first workout and at the end I couldn’t save. See the image below.

I have MacOS Catalina 10.15

Not sure how to debug.

I’m not a Mac person so apart from checking Zwift has WRITE access to the folder its trying to write to, I’d suggest you use this online editor which fairly much the same, except the scripting side is really fast. When finished, you can upload to your workouts folder from within the app.

edit: url added!