have you still got the solution? I am facing a problem with migration following the same blog . . . but the issue is with the format of JSON.
ValueError: Unknown data format for file 'data/salesCrm-prod-agent\intents\agent.CRM.subCategory.103.json'.
I was migrating from Dialogflow to Rasa with the command.
rasa data convert nlu --data data/salesCrm-prod-agent --out data/nlu.yml --format yml
I am following the blog : How to Migrate your Existing Google DialogFlow Assistant to Rasa | The Rasa Blog | Rasa and corresponding GitHub folder . . . but its failing please help . . .