Errors occurred during the build. Errors running builder 'DeploymentBuilder' on project 'XXX '. java.lang.NullPointerException
1. Shut down the workspace.
2. Delete the file com.genuitec.eclipse.ast.deploy.core.prefs which is located at <workspace dir>/.metadata/.plugins/org.eclipse.core.runtime/.settings/com.genuitec.eclipse.ast.deploy.core.prefs
3. Start the IDE.