Hi, @happyclick
Ensure that the data source is still accessible and has not been moved, renamed, or deleted. If it's an on-premises source, verify that it's online and accessible. For more information, see the Power BI tile refresh error documentation:
Troubleshooting tile errors - Power BI | Microsoft Learn
Confirm that you have the necessary permissions to access the data source and save changes to the model. If you're working in a shared environment, you may need to contact the dashboard owner or administrator to make sure you have the appropriate access to your account.
Errors can also occur if there are issues with relationships between tables, or if the model tries to use a field that no longer exists. Review the relationships of the model and make sure that all the fields used in the model are present and correctly configured. Guidance on creating and managing relationships in Power BI Desktop might be helpful:
Create and manage relationships in Power BI Desktop - Power BI | Microsoft Learn
If your model is complex and you query large amounts of data, you may run into resource constraints. Try simplifying the model or applying filters to reduce the amount of data.
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Best Regards
Yongkang Hua
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