Warning: session_start(): Cannot start session when headers already sent in /home/appstop/testeloja.appstop.site/header.php on line 11

Warning: Cannot modify header information - headers already sent by (output started at /home/appstop/testeloja.appstop.site/config_app.php:1) in /home/appstop/testeloja.appstop.site/header.php on line 20