Machine Learning backend scripts are not running for HTML documents

Hi Team,

I added the machine learning backend succesfully and trained model for both NER and Text classification task (when I imported the CSV documents). But when I am adding the NER backend for HTML documents , I am facing issues -

Here is my Labelling configuration -


Here is the error I am facing -


I think its not working because of HyperTextlabels (which are not actually parsed by the backend) in labelling configuration. Please let me know how I can resolve this.

Thanks