'Save to' field not working in Automated backup setup

by Tony H.  

The automated backups are working correctly, but the .mbz files are not stored in the Save to field (backup_auto_destination). Instead,  the backup files go to their default location (we can only access them through the course interface). We are running Moodle 3.3.2 (Build: 20170911).

• The path exists and there is a green checkbox next to it, indicating that Moodle can access it. 
• To rule out a permissions issue, we changed the folder owner to match the owner of the web process and changed the folder permissions to 777.  Furthermore, we tried executing php admin/cli/automated_backups.php as root.

Options?

Best regards,
Tony