Hi NayanitaBhattacharyya-8065,
Thanks for reaching out to us on the Microsoft Q&A forum.
From your question we understand that you are trying to complete the exercise from Exercise - Prepare data in Power BI Desktop
Sorry for the inconvenience caused to you. Try to clear your browser history and avoid opening other tabs while performing the lab.
We've tested it on our end, and everything is working fine. Please refer to the screenshots below:
Please don't hesitate to reach out to us if you have any other queries.
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