@_Esteban Bett - Thanks for the question and using MS Q&A platform.
The error message you received indicates that the ADX cluster is not ready to answer queries yet. This is usually a transient state that could occur periodically.
If the issue persists, it could either be a result of over-usage, leading to significant load on the admin node, or a different issue.
If you need assistance with troubleshooting, I would recommend that you open a support request via the Azure portal. The support team can help you investigate the issue further and provide guidance on how to resolve it.
Hope this helps. Do let us know if you any further queries.