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Hi powerbiexpert22​,

Since the report is connected to a semantic model hosted in the Prod workspace, I would first check whether you still have access to that semantic model.

A few things to check:

• Confirm you have permission to the Prod workspace/semantic model.
• Open the semantic model directly in the Power BI Service and make sure it is accessible.
• Check whether the semantic model was renamed, replaced, or republished recently.
• In Power BI Desktop, sign out and sign back in with the same account that has access to the Prod workspace.
• If the report uses a live connection, check whether the connection is still pointing to the correct workspace and semantic model.
• If the semantic model was recently redeployed, verify that the report connection wasn't broken during the deployment.

If other users can open the same report successfully, then I would focus on your account permissions or cached credentials in Desktop.

If nobody can access it, then the semantic model itself or its workspace permissions should be checked by the owner/admin.

Also, if this started immediately after a deployment from UAT to Prod, I'd specifically check whether the semantic model ID/connection was changed during the deployment.