@Darshan Welcome to Microsoft Q&A forum and thanks for reaching out here.
I would highly encourage you to go through this troubleshooting guide and see if it helps to resolve your issue. This issue usually occurs when your network prevents communication to the Azure Synapse Analytics back-end.
Hope this info helps. In case if the provided troubleshooting guide didn't help to resolve the issue, it may need deeper investigation. Please let us know how it goes.
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