If Apple Logic crashes when trying to save, export or bounce a project, there is one easy way to workaround that problem. I'll tell you what to do in this article.
You are trying to save, export or bounce an Apple Logic project, but you encounter an error which results in a crashing Logic-App.
I worked out that this error occurs, when the app is trying to get file-system access in a file-browser-window.
To solve this problem simply keep logic closed, go to system settings and deactivate iCloud Drive under iCloud settings.
Now restart Logic and you are ready to save your project.