Error message

• Warning: foreach() argument must be of type array|object, string given in template_preprocess_views_view_fullcalendar() (line 428 of modules/fullcalendar_view/fullcalendar_view.theme.inc).
• Warning: foreach() argument must be of type array|object, string given in template_preprocess_views_view_fullcalendar() (line 428 of modules/fullcalendar_view/fullcalendar_view.theme.inc).
• Warning: foreach() argument must be of type array|object, string given in template_preprocess_views_view_fullcalendar() (line 428 of modules/fullcalendar_view/fullcalendar_view.theme.inc).
• Warning: foreach() argument must be of type array|object, string given in template_preprocess_views_view_fullcalendar() (line 428 of modules/fullcalendar_view/fullcalendar_view.theme.inc).
• Warning: foreach() argument must be of type array|object, string given in template_preprocess_views_view_fullcalendar() (line 428 of modules/fullcalendar_view/fullcalendar_view.theme.inc).
• Warning: foreach() argument must be of type array|object, string given in template_preprocess_views_view_fullcalendar() (line 428 of modules/fullcalendar_view/fullcalendar_view.theme.inc).
• Warning: foreach() argument must be of type array|object, string given in template_preprocess_views_view_fullcalendar() (line 428 of modules/fullcalendar_view/fullcalendar_view.theme.inc).