Unlike similar plugins (and possibly previous versions of this), the publisher silently fails if no files are found.
It should instead fail by default, with an option to ignore this error.
Parse errors don't cause failures either, only log messages:
[DependencyCheck] Collecting Dependency-Check artifact [DependencyCheck] Unable to parse /var/lib/jenkins/node/workspace/a-platform_test-dependency-check/dependency-check-report.xml [DependencyCheck] Unsupported Dependency-Check schema version detected
What version of the plugin are you using? v5.0.0 or 5.0.1?