When I try execute The Coder review in a Drupal Installation (Version 7), I have the follow error:

Started by user Administrador
Building in workspace /var/lib/jenkins/prueba/www
[DRUPAL] Drush executable 'null' from installation 'Default' could not be found, fall back to 'drush'
[www] $ drush --yes --nocolor --root=/var/lib/jenkins/prueba/www pm-list --pipe --format=json --type=module
ERROR: Build step failed with exception
java.lang.NullPointerException
at org.jenkinsci.plugins.drupal.beans.DrushInvocation.getProjects(DrushInvocation.java:222)
at org.jenkinsci.plugins.drupal.beans.DrushInvocation.isModuleInstalled(DrushInvocation.java:233)
at org.jenkinsci.plugins.drupal.builders.DrupalReviewBuilder.perform(DrupalReviewBuilder.java:98)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:779)
at hudson.model.Build$BuildExecution.build(Build.java:205)
at hudson.model.Build$BuildExecution.doRun(Build.java:162)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:534)
at hudson.model.Run.execute(Run.java:1741)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:98)
at hudson.model.Executor.run(Executor.java:410)
Build step 'Review code on Drupal' marked build as failure
Finished: FAILURE