I am currently working on loading a learner model from a pickle file. This model includes a custom loss function and needs to be integrated into a Flask application. The loss function is in the same file as the Flask app.

However, I keep encountering the following error:

Custom classes or functions exported with your `Learner` not available in namespace.Re-declare/import before loading:
    Can't get attribute 'combined_loss' on <module '__main__' from 'C:\Users\Desktop\Meteor\flask_app\venv\Scripts\flask.exe\__main__.py'>