Ralph, since you were involved in the "No error emitted when using a YAML configuration without additional dependency" issue <https://github.com/apache/logging-log4j2/issues/1501> (#1501) and the PR <https://github.com/apache/logging-log4j2/pull/1592> (#1592) associated with it, could you help to make some progress there? Maybe guide the PR author a bit?
