Fatal error: Uncaught Error: Interface 'Magento\Framework\Lock\LockManagerInterface' not found in /home/esecureh/public_html/magdemo/vendor/magento/framework/Lock/Backend/FileLock.php:19 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/vendor/magento/framework/Lock/Backend/FileLock.php on line 19