Need Help getting error: Expression.Error: 2 arguments were passed to a function which expects 1

Hi 

was wondering if any of you can help me with the SQL code below, my knowldge with SQL is basic at best and im kinda new with powerBI. Trying to do a direct query with the code below but its giving me an error:

Expression.Error: 2 arguments were passed to a function which expects 1.
Details:
Pattern=
Arguments=List

Code:

let
Source = Sql.Databases("MelbVMSQL\coinopsoftware.com,1433"),
coinopamf = Source{[Name="coinopamf"]}[Data],
coinopamf_ufn_MonthlyTransactionReport1 = coinopamf{[Schema="coinopamf",Item="ufn_MonthlyTransactionReport1"]}[Data],
#"Invoked Functioncoinopamf_ufn_MonthlyTransactionReport1" = coinopamf_ufn_MonthlyTransactionReport1(#datetime(2010, 1, 1, 0, 0, 0), #datetime(2019, 3, 7, 0, 0, 0))
in
#"Invoked Functioncoinopamf_ufn_MonthlyTransactionReport1"

Hoping you guys can help me with this.