PHPDocumentor error

[nkavian]

typing "mvn clean site" generates this error, any thoughts how to resolve it?

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-site-plugin:3.0:site (default-site) on project my-app: Error during page generation: Error rendering Maven report: dependency resolution failed for net.php:PhpDocumentor:1.4.2