Microsoft Power BI Desktop (Optimized for Power BI Report Server - May 2021) Went Wrong

Check if you need RS version of Power BI Desktop (optimized for onpremise PBI Report Server)

If not, install latest version of clasic Power BI Desktop.

If you need RS, check if you need old May 2021 version, this version will be soon unsupported. But required version depend on version of server.