Se corrige un método.

Controller/WorkflowController.php

@@ -68,7 +68,7 @@ class WorkflowController extends Controller
         $admin = $this->admin;
         $back_route = $admin->getBaseRouteName()."_list";
 
-        $workflow = $object->getWorkflowObject();
+        $workflow = $object->getServiceWorkflow();
 
         if($workflow) {
             $definition = $workflow->getDefinition();