Error message

• User warning: The following module is missing from the file system: lightning. For information about how to fix this, see the documentation page. in _drupal_trigger_error_with_delayed_logging() (line 1143 of /opt/bitnami/apps/drupal/htdocs/includes/bootstrap.inc).
• Warning: chmod(): Operation not permitted in _event_css_add() (line 272 of /opt/bitnami/apps/drupal/htdocs/sites/all/modules/contrib/event_calendar/event_calendar_colors/event_calendar_colors.module).