If the sync process is not working, you can try the following troubleshooting steps:
Check if the Air Flow app and your computer are both up to date.
Resync the workspace by closing the Air Flow app and delete the workspace folder in Finder. Reopening the app will log you out and then prompt you to sign in and sync a workspace again.
Check if there is enough storage space available on your computer and in your Air workspace.
Uninstall and reinstall the app.
Contact Air Support for further assistance.