Fatal error: Uncaught Error: Class "Magento\Framework\App\Helper\AbstractHelper" not found in /home/airtimer/public_html/app/code/Magiccart/Magicslider/Helper/Data.php:17 Stack trace: #0 {main} thrown in /home/airtimer/public_html/app/code/Magiccart/Magicslider/Helper/Data.php on line 17