Vaadin Flow 3.0.3 is a maintenance release for Vaadin 15 with the following changes: Bugfixes and enhancements Removed a reference to the legacy frontend:// protocol so that a user won't get the Error loading frontend://dndConnector.js error message. (#7753). Fixed a log issue that after upgrading the Webpack version, it outputs unnecessary Webpack compilation progress logs(#7841). See all the changes in Flow 3.0.3