Goodmorning,
In this unit (https://www.pianosegreto.com/unit/esercizio-6-circolo-delle-quinte/)
at the end of the page this error message appears:
Warning: Invalid argument supplied for foreach() in /home/pianoseg/public_html/wp-content/plugins/vibe-course-module/includes/bp-course-functions.php on line 1068
Why this happens? Can you help me removing it?
Thank you