core: handle error when cleaning up sessions and cached session can't be loaded

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

authentik/admin/api/tasks.py

@@ -50,7 +50,8 @@ class TaskSerializer(PassiveSerializer):
         are pickled in cache. In that case, just delete the info"""
         try:
             return super().to_representation(instance)
-        except AttributeError:  # pragma: no cover
+        # pylint: disable=broad-except
+        except Exception:  # pragma: no cover
             if isinstance(self.instance, list):
                 for inst in self.instance:
                     inst.delete()