Biała strona główna sklepu o panelu administracyjnego

[presko]

witam,

 

Gdy wchodzę na sklep mam taki błąd

 

Whoops, looks like something went wrong.
1/1 ContextErrorException in FrontController.php line 924: Warning: Cannot modify header information - headers already sent by (output started at /home/hewea/ftp/prestashop/classes/Tools.php:1)

    in FrontController.php line 924
    at ErrorHandler->handleError('2', 'Cannot modify header information - headers already sent by (output started at /home/hewea/ftp/prestashop/classes/Tools.php:1)', '/home/hewea/ftp/prestashop/classes/controller/FrontController.php', '924', array())
    at header('P3P: CP="IDC DSP COR CURa ADMa OUR IND PHY ONL COM STA"') in FrontController.php line 924
    at FrontControllerCore->initHeader() in Controller.php line 201
    at ControllerCore->run() in Dispatcher.php line 379
    at DispatcherCore->dispatch() in index.php line 28

Jak chcę się zalogować do panelu administracyjnego jest biała strona pomimo włączonego trybu debugowania