Warning: You should set `zend.assertions` to `1` in your php.ini for your development environment. in /home/helmi/homepages/pc-factory.at/school5/vendor/cakephp/cakephp/src/Core/Configure.php on line 102

Deprecated: League\Container\Container::__construct(): Implicitly marking parameter $definitions as nullable is deprecated, the explicit nullable type must be used instead in /home/helmi/homepages/pc-factory.at/school5/vendor/league/container/src/Container.php on line 42

Deprecated: League\Container\Container::__construct(): Implicitly marking parameter $providers as nullable is deprecated, the explicit nullable type must be used instead in /home/helmi/homepages/pc-factory.at/school5/vendor/league/container/src/Container.php on line 42

Deprecated: League\Container\Container::__construct(): Implicitly marking parameter $inflectors as nullable is deprecated, the explicit nullable type must be used instead in /home/helmi/homepages/pc-factory.at/school5/vendor/league/container/src/Container.php on line 42

Deprecated: League\Container\Container::inflector(): Implicitly marking parameter $callback as nullable is deprecated, the explicit nullable type must be used instead in /home/helmi/homepages/pc-factory.at/school5/vendor/league/container/src/Container.php on line 156

Deprecated: League\Container\DefinitionContainerInterface::inflector(): Implicitly marking parameter $callback as nullable is deprecated, the explicit nullable type must be used instead in /home/helmi/homepages/pc-factory.at/school5/vendor/league/container/src/DefinitionContainerInterface.php on line 19

Deprecated: League\Container\Inflector\InflectorAggregate::add(): Implicitly marking parameter $callback as nullable is deprecated, the explicit nullable type must be used instead in /home/helmi/homepages/pc-factory.at/school5/vendor/league/container/src/Inflector/InflectorAggregate.php on line 19

Deprecated: League\Container\Inflector\InflectorAggregateInterface::add(): Implicitly marking parameter $callback as nullable is deprecated, the explicit nullable type must be used instead in /home/helmi/homepages/pc-factory.at/school5/vendor/league/container/src/Inflector/InflectorAggregateInterface.php on line 12

Deprecated: Constant Cake\Error\E_STRICT is deprecated in /home/helmi/homepages/pc-factory.at/school5/vendor/cakephp/cakephp/src/Error/PhpError.php on line 66
Deprecated (8192) : Creation of dynamic property App\Controller\ShowController::$title is deprecated [in /home/helmi/homepages/pc-factory.at/school5/src/Controller/ShowController.php, line 92]
Warning (512) : Unable to emit headers. Headers sent in file=/home/helmi/homepages/pc-factory.at/school5/vendor/cakephp/cakephp/src/Error/Renderer/HtmlErrorRenderer.php line=37 [in /home/helmi/homepages/pc-factory.at/school5/vendor/cakephp/cakephp/src/Http/ResponseEmitter.php, line 65]
Warning (2) : Cannot modify header information - headers already sent by (output started at /home/helmi/homepages/pc-factory.at/school5/vendor/cakephp/cakephp/src/Error/Renderer/HtmlErrorRenderer.php:37) [in /home/helmi/homepages/pc-factory.at/school5/vendor/cakephp/cakephp/src/Http/ResponseEmitter.php, line 159]
Warning (2) : Cannot modify header information - headers already sent by (output started at /home/helmi/homepages/pc-factory.at/school5/vendor/cakephp/cakephp/src/Error/Renderer/HtmlErrorRenderer.php:37) [in /home/helmi/homepages/pc-factory.at/school5/vendor/cakephp/cakephp/src/Http/ResponseEmitter.php, line 192]
Error: Call to undefined method Cake\View\ViewBuilder::layout()

Call to undefined method Cake\View\ViewBuilder::layout() 📋

Error
Error in: APP/Controller/ShowController.php, line 93
APP/Controller/ShowController.php at line 93 (edit)
    }
    function slideshow() {
        $this->title = 'School Community System: Slideshow';
        $this->viewBuilder()->layout('slideshow');
    }
    function presentation() {
        $this->title = 'School Community System: Presentation';

If you want to customize this error message, create templates/Error/error500.php