3333546 - Cannot find assembly "sapnco, Version=3.0.042, Culture=neutral, publicKeyToken=" in GAC and "DataSource.MissingClientLibrary" errors when opening SAP Business Warehouse through Power BI

Connection errors from Power BI Desktop when connecting to SAP Business Warehouse occur after upgrading SAP GUI for Windows:

• "DataSource.MissingClientLibrary", requesting to download "SAP .NET Connector 3.0.0.42".
• SAP Business Warehouse Application Server:

Cannot find assembly "sapnco, Version=3.0.042, Culture=neutral, publicKeyToken=50436dca5c7f7d23" in GAC. Ensure that "install assemblies to GAC" is selected when installing the SAP .NET connector.

Microsoft Power BI Desktop 64-bit 

SAP GUI 770 and higher

SAP .NET Connector 3.1, Microsoft Power BI, SAP BW Application Server, Warehouse, Cannot find assembly in GAC, sapnco, Version, 3.0.042, Culture=neutral, DataSource.MissingClientLibrary, SAP GUI. , KBA , BC-FES-GUI , SAP GUI for Windows , BC-MID-CON-NCO , SAP .Net Connector , Problem