The application could not run because of the following error:
#0 /var/klenkes/frontend-prod/classes/Model/Base.php(63): Klenkes\Model\Article::get() #1 /var/klenkes/frontend-prod/classes/Controller/PageController.php(66): Klenkes\Model\Base::getData() #2 /var/klenkes/frontend-prod/classes/Controller/PageController.php(29): Klenkes\Controller\PageController->getDataFromSource() #3 /var/klenkes/frontend-prod/classes/Routing.php(72): Klenkes\Controller\PageController->__construct() #4 [internal function]: Klenkes\Routing->Klenkes\{closure}() #5 /var/klenkes/frontend-prod/vendor/slim/slim/Slim/Handlers/Strategies/RequestResponse.php(40): call_user_func() #6 /var/klenkes/frontend-prod/vendor/slim/slim/Slim/Route.php(281): Slim\Handlers\Strategies\RequestResponse->__invoke() #7 /var/klenkes/frontend-prod/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(117): Slim\Route->__invoke() #8 /var/klenkes/frontend-prod/vendor/slim/slim/Slim/Route.php(268): Slim\Route->callMiddlewareStack() #9 /var/klenkes/frontend-prod/vendor/slim/slim/Slim/App.php(503): Slim\Route->run() #10 /var/klenkes/frontend-prod/www/index.php(10): Slim\App->__invoke() #11 [internal function]: Closure->{closure}() #12 /var/klenkes/frontend-prod/vendor/slim/slim/Slim/DeferredCallable.php(57): call_user_func_array() #13 [internal function]: Slim\DeferredCallable->__invoke() #14 /var/klenkes/frontend-prod/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(70): call_user_func() #15 /var/klenkes/frontend-prod/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(117): Slim\App->Slim\{closure}() #16 /var/klenkes/frontend-prod/vendor/slim/slim/Slim/App.php(392): Slim\App->callMiddlewareStack() #17 /var/klenkes/frontend-prod/vendor/slim/slim/Slim/App.php(297): Slim\App->process() #18 /var/klenkes/frontend-prod/www/index.php(26): Slim\App->run() #19 {main}