Unable to edit queries

Anonymous 

it seems like you are connected to SSAS data source via Live Connection option which doesnt allow to edit Queries, according 

Question: If I created a live connection, can I edit the model or query in Power BI Desktop?

Answer: You can create report level measures in the Power BI Desktop, but all other query and modeling features are disabled when exploring live data.

from here https://docs.microsoft.com/en-us/power-bi/desktop-analysis-services-tabular-data#frequently-asked-questions