Update ScenarioSerializer.cs

com.unity.perception/Runtime/Randomization/Scenarios/Serialization/ScenarioSerializer.cs

             }
             else
             {
-                field.SetValue(obj, Convert.ChangeType(readScalar, field.FieldType));
+                field.SetValue(obj, Convert.ChangeType(readScalar.Item1, field.FieldType));
             }
         }