SSAS/Power BI Report Builder getting dataset connection string error

Hi Anonymous ,

For datasets that use a Live Connection to Analysis Services, you can connect directly by using the underlying Analysis Services connection instead of a shared dataset.

For more details, you can read related document: Create a paginated report with a Power BI shared dataset - Power BI Report Builder - Power BI | Microsoft Learn

Best regards,
Community Support Team_Binbin Yu
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Thank you so much!