Power Query Stored Procedure Invalid Identifier

Hi all,

Using Excel Microsoft 365.

I created a Stored Procedure in Management Studio - tested - works.
Now I am trying to call the sp from Excel Power Query and pass the parameter
I keep getting error

Expression.SyntaxError: Invalid Identifier

I don't see what is worng with my M Script - do you see any problems?

let
    DepartmentName=Excel.CurrentWorkbook(){[Name=”param”]}[Content]{0}[#”Department”],
    Source = Sql.Database("localhost\SQL2017INSTANCE2", "AdventureWorksDW2017",
    [Query="exec [dbo].[usp_SelectEmployees]'"
    & DepartmentName
    &"'"])
in
    Source

Thanks,
w