Fatal error: Uncaught Error: Interface 'Magento\Framework\View\File\CollectorInterface' not found in /home/esecureh/public_html/magdemo/vendor/magento/framework/View/File/Collector/Theme.php:18 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/vendor/magento/framework/View/File/Collector/Theme.php on line 18