As addition to other responses, @JsonProperty annotation is really essential if you utilize the @JsonCreator annotation in classes which do not need a no-arg constructor. So your DataContext for "video_length_textbox" is ready to alone, plus your IncrementingTextBox class does not have a public property named ConfigurationModel I did this in https://toppropertiesingurgaon.food.blog/2025/07/10/benefits-of-buying-a-flat-at-aipl-sector-103-gurgaon/