Fatal error: Uncaught Error: Interface 'Magento\Indexer\Model\Source\DataInterface' not found in /home/esecureh/public_html/magdemo/vendor/magento/module-indexer/Model/Source/ServiceSource.php:13 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/vendor/magento/module-indexer/Model/Source/ServiceSource.php on line 13