White screen on admin with error

[FerreireX]

Hi

When I go to my admin area just show a white page, I have activated the debug mode and show this error

 

Warning: Declaration of Tools::getPath($id_category, $path = '', $link_on_the_item = false, $category_type = 'products', ?Context $context = NULL) should be compatible with ToolsCore::getPath($url_base, $id_category, $path = '', $highlight = '', $category_type = 'catalog', $home = false) in /Applications/MAMP/htdocs/rail17/override/classes/Tools.php on line 65

 

RuntimeException in NativeSessionStorage.php line 147:Failed to start the session because headers have already been sent by "/Applications/MAMP/htdocs/rail17/override/classes/Tools.php" at line 65.

1. in NativeSessionStorage.php line 147
2. at NativeSessionStorage->start() in Session.php line 55
3. at Session->start() in SessionTokenStorage.php line 78
4. at SessionTokenStorage->hasToken('ANONYMOUS_USER') in CsrfTokenManager.php line 72
5. at CsrfTokenManager->getToken('ANONYMOUS_USER') in Router.php line 48
6. at Router->generate('admin_module_catalog', array(), '0') in Link.php line 733
7. at LinkCore->getAdminLink('AdminModulesSf') in AdminController.php line 2188
8. at AdminControllerCore->getAdminModulesUrl() in AdminController.php line 2168
9. at AdminControllerCore->addPageHeaderToolBarModulesListButton() in AdminController.php line 1560
10. at AdminControllerCore->initPageHeaderToolbar() in AdminDashboardController.php line 65
11. at AdminDashboardControllerCore->initPageHeaderToolbar() in AdminController.php line 2120
12. at AdminControllerCore->initToolbarFlags() in AdminController.php line 2851
13. at AdminControllerCore->init() in Controller.php line 186
14. at ControllerCore->run() in Dispatcher.php line 428
15. at DispatcherCore->dispatch() in index.php line 96

[FerreireX]

Can anyone help on this?