Unexpected Error Value cannot be null paramenter name Key

[Khristian]

Hi everyone, i spent two weeks trying to resolve this.

When i try to connect SSAS trough BI Desktop, when finally the connect is established, this error appears.

Unexpect Error:
Value cannot be null.
Parameter name: Key

I installed and un uninstalled de framework.

some advice?

[Shahid12523]

Ensure Power BI Desktop is latest version compatible with your SSAS instance.

Clear cached connections:

Go to File → Options and settings → Data source settings → Clear Permissions for SSAS.

Make sure your SSAS Tabular model is processed and accessible.

Check that .NET Framework 4.6+ is installed.

Try connecting using “Connect live” instead of import.

👉 Usually, clearing cached credentials + updating Power BI Desktop solves this.

[ankitpatira]

@Khristian have you tried with latest powerbi desktop update from April 2016.

https://powerbi.microsoft.com/en-us/blog/power-bi-desktop-april-update-feature-summary/

[Khristian]

In fact the problem was defined the user into sql