DAX ISSSUBTOTAL Evaluate Issue

I'm trying to evaluate below query but getting error "Query(22,48) Column "Category" cannot be found or may not be used in this expression".

Let me know if i'm missing something.

DEFINE
    VAR table1 =
        UNION (
            ROW ( "Cateogry", "A", "Value", INT ( 1 ) ),
            ROW ( "Cateogry", "A", "Value", INT ( 2 ) ),
            ROW ( "Cateogry", "A", "Value", INT ( 3 ) ),
            ROW ( "Cateogry", "B", "Value", INT ( 4 ) ),
            ROW ( "Cateogry", "B", "Value", INT ( 5 ) ),
            ROW ( "Cateogry", "C", "Value", INT ( 6 ) ),
            ROW ( "Cateogry", "c", "Value", INT ( 7 ) )
        )
    --EVALUATE table1
   VAR H =
        SUMMARIZE (
            table1,
            ROLLUP ( [Cateogry] ),
            "Sum of Value", SUMX ( table1, [Value] ),
            "Max of Value", MAXX ( table1, [Value] ),
            "Average of Value", FIXED ( AVERAGEX ( table1, [Value] ), 1 ),
            "Is Category Subtotal", ISSUBTOTAL([Category])
        )

EVALUATE
H

Thanks,

Harry