Downstream service call failed with status code 403 (Dataflow)

Hi marcopaz 
Thank you reaching out microsoft fabric community forum.
Since it works on another computer, the issue seems specific to your laptop. Please try opening the Windows Credential Manager, go to the Windows Credentials tab, and remove any entries related to Power BI, Microsoft accounts, or Dataflows. Then restart Power BI Desktop and try again. Also, temporarily disable any third-party antivirus or firewall software, as it might be blocking part of the connection. Try running Power BI Desktop as administrator by right-clicking the shortcut and selecting "Run as administrator." If the issue persists, try logging in with a different Windows user account on your laptop to see if it works there.

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Thank you.