Missed a return statement in the setupInstall method. This was causing setup to fail every time, because the function returned a defined value.

webtools/PLIF/PLIF/Service/Components/CosesEditor.pm

@@ -385,6 +385,7 @@ sub setupInstall {
     my $userDataSource = $app->getService('dataSource.user');
     $userDataSource->addRight($app, 'cosesEditor');
     $self->dump(9, 'done configuring COSES editor');
+    return;
 }