Avoid updating activity to error when we could not fetch the element

arkindex_worker/worker/__init__.py

@@ -149,11 +149,8 @@ class ElementsWorker(
                 self.update_activity(element.id, ActivityState.Processed)
             except Exception as e:
                 failed += 1
-                element_id = (
-                    element.id
-                    if isinstance(element, (Element, CachedElement))
-                    else item
-                )
+                # Handle the case where we failed retrieving the element
+                element_id = element.id if element else item
 
                 if isinstance(e, ErrorResponse):
                     message = f"An API error occurred while processing element {element_id}: {e.title} - {e.content}"
@@ -164,7 +161,8 @@ class ElementsWorker(
                     message,
                     exc_info=e if self.args.verbose else None,
                 )
-                self.update_activity(element_id, ActivityState.Error)
+                if element:
+                    self.update_activity(element.id, ActivityState.Error)
                 self.report.error(element_id, e)
 
         # Save report as local artifact