Fixed: show list of workflow, event if some accompanying course document associated to a workflow are deleted

src/Bundle/ChillDocStoreBundle/Workflow/AccompanyingCourseDocumentWorkflowHandler.php

@@ -65,6 +65,10 @@ class AccompanyingCourseDocumentWorkflowHandler implements EntityWorkflowHandler
     {
         $doc = $this->getRelatedEntity($entityWorkflow);
 
+        if (null === $doc) {
+            return $this->translator->trans('workflow.Document deleted');
+        }
+
         return $this->translator->trans('workflow.Document (n°%doc%)', ['%doc%' => $entityWorkflow->getRelatedEntityId()])
             . ' - ' . $doc->getTitle();
     }