Error message

• Warning: Cannot modify header information - headers already sent by (output started at /home/crowdsto/public_html/includes/common.inc:2726) in drupal_send_headers() (line 1233 of /home/crowdsto/public_html/includes/bootstrap.inc).
• Error: Call to a member function queryReportFeed() on null in google_analytics_counter_report_data() (line 401 of /home/crowdsto/public_html/sites/all/modules/google_analytics_counter/google_analytics_counter_data.inc).