VLOOKUP getting value instead of 0 from blank cell

Having hard time using the below formula, running a VLOOKUP from pivot table and incremental the values when I drag the formula, even working fine however where the cell is blank result is still being populated as 12:00:00 AM

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Formula : =IFERROR(VLOOKUP($ A3,PivotTable!$ A$ 7:$ M$ 34,COLUMN(C:C),0)," ")