Fatal error: Uncaught Error: Interface 'Magento\Framework\Lock\LockManagerInterface' not found in /home/esecureh/public_html/magdemo/dev/tests/integration/framework/Magento/TestFramework/Lock/Backend/DummyLocker.php:15 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/dev/tests/integration/framework/Magento/TestFramework/Lock/Backend/DummyLocker.php on line 15