Cannot resolve attribute 'Slug' in the model<br><pre>#0 [internal function]: Phalcon\Mvc\Model::_invokeFinder()
#1 /var/www/html/app/controllers/IndexController.php(319): Phalcon\Mvc\Model::__callStatic()
#2 [internal function]: IndexController->pageAction()
#3 [internal function]: Phalcon\Dispatcher\AbstractDispatcher->callActionMethod()
#4 [internal function]: Phalcon\Dispatcher\AbstractDispatcher->dispatch()
#5 /var/www/html/public/index.php(42): Phalcon\Mvc\Application->handle()
#6 {main}</pre>