hi , this is my first time try somthing change on power BI service , but the report doesn't work when i choose DataSet to be changed. Any idea ? it shown blank on the Reports.
It's expected. The dataset on Power BI service doesn't contain any visuals. You can add desired visuals to visualize data from this dataset, and save the report. See: https://docs.microsoft.com/en-us/power-bi/service-basic-concepts#datasets
Besides, we can't change dataset for the report on Power BI service. We need to open the report in Power BI desktop then change data sources, republish the report to Power BI service.
Best Regards,Qiuyun Yu