no se encuentra la página

Warning (2): Trying to access array offset on null [APP/controllers/app_controller.php, line 58]Code            )));
        }
        $output = call_user_func_array(array(&$controller, $params['action']), $params['pass']);
AppController::index() - APP/controllers/app_controller.php, line 58
Dispatcher::_invoke() - CORE/cake/dispatcher.php, line 204
Dispatcher::dispatch() - CORE/cake/dispatcher.php, line 171
[main] - APP/webroot/index.php, line 86

Warning: Trying to access array offset on null in /var/www/vhosts/fastbikesbcn.es/httpdocs/app/controllers/app_controller.php on line 58

Fatal error: Uncaught TypeError: key(): Argument #1 ($array) must be of type array, null given in /var/www/vhosts/fastbikesbcn.es/httpdocs/app/models/texto.php:31 Stack trace: #0 /var/www/vhosts/fastbikesbcn.es/httpdocs/app/models/texto.php(31): key() #1 /var/www/vhosts/fastbikesbcn.es/httpdocs/app/controllers/app_controller.php(60): Texto->get_textos() #2 /var/www/vhosts/fastbikesbcn.es/httpdocs/cake/dispatcher.php(204): AppController->index() #3 /var/www/vhosts/fastbikesbcn.es/httpdocs/cake/dispatcher.php(171): Dispatcher->_invoke() #4 /var/www/vhosts/fastbikesbcn.es/httpdocs/app/webroot/index.php(86): Dispatcher->dispatch() #5 {main} thrown in /var/www/vhosts/fastbikesbcn.es/httpdocs/app/models/texto.php on line 31