Issue with Microsoft.AnalysisServices v19.96.1 – “API is not accessible for application” Error

Hi everyone,

I'm currently facing an issue while trying to connect to a Power BI workspace using the Microsoft.AnalysisServices library in our C# backend code.

Here’s the snippet we’re using:

string workspaceName = await _utilityService.GetWorkspaceName(WorkspaceID);
string connectionString = _utilityService.GetConnectionString(workspaceName);

string catalog = DatasetName;
Server server = new Server();
server.Connect(connectionString);

This works perfectly when we use Microsoft.AnalysisServices v19.90.0.

However, when we upgrade to v19.96.1, the following error occurs during connection:

{
    "errorMessage": "PowerBI Request Failed.\r\n\r\nAction: Resolving the PBI workspace\r\n\r\nDescription: {\"Message\":\"API is not accessible for application\"}\r\n\r\nTechnical Details:\r\nRootActivityId: 9f71dfbb-fe3f-47de-9c7e-770b29bee817",
    "statusCode": 500
}

Has anyone else encountered this issue after upgrading to v19.96.1?

• Is this a known change in how authentication or API access is handled in newer versions?

• Do we need additional permissions, headers, or configuration with the newer version?

Any guidance or insights would be greatly appreciated!

Thanks in advance!