pywintypes.com_error: (-2147467262, 'No such interface supported', None, None)

def xl_vba(self, aop_src, aop_dst, gsrp_src, prod_src, year_of_int):

    xw.App(visible=False)
    # initialize row offsets
    file_list = os.listdir('%s' % aop_src)
    excel_file_index = 0
    prod_data_start_row = 3
    os.chdir((aop_src))
    for file in (file_list[excel_file_index:]):
        if file.endswith(".xlsx") and ("AOP" in file):
            current_book = xw.Book(file)
            if "Combined" not in file:
                project_sheet = current_book.sheets[1]
            else:
                for sheet in current_book.sheets:
                    if "Project" in current_book[sheet].name:
                        project_sheet = current_book[sheet]

            # Set Year of Interest
            project_sheet.range('J17').options(numbers=int).value = 2018

            # Set B48 According to DC Size
            dc_size = float(project_sheet.range('B3').value)
            if dc_size >= 2000:
                project_sheet.range('B48').value = 0.99
            else:
                project_sheet.range('B48').value = 0.98

            # Get fields
            losses = project_sheet.range('C88:N88').value
            net_gen = project_sheet.range('C90:N90').value
            ghi = project_sheet.range('M3:M14').value
            aop_prod = project_sheet.range('AM32').options(numbers=float).value

            project_code = "XX-03-"
            asset_id = project_sheet.range('B1').options(numbers=int).value
            project_name = project_sheet.range('B2').value
            my_date_handler = lambda month, day, year, **kwargs: "%02i%02i%04i" % (month, day, year)
            current_date = project_sheet.range('B9').options(dates=my_date_handler).value

            file_name = project_code + str(asset_id) + "-" + project_name + "-" + "AOP" + "-" + str(current_date) + ".xlsx"

            current_book.save('%s%s' % (aop_dst, file_name))
            current_book.close()

            production_book = xw.Book(prod_src)
            production_sheet = production_book.sheets[0]
            production_sheet.range('C%s' %prod_data_start_row).value = aop_prod
            production_book.save()
            production_book.close()

        excel_file_index += 1