You do not need a control number.
That is just a number that the payroll team uses to identify your W-2 for their system purposes. This is not something the IRS needs, so as long as you input something in this format, you can proceed.
Just put in that combination of numbers in this specific format 5 digits, space, 5 digits (for example, 12345 67890). Do not enter any letters, only numbers.
So enter it like this with a space in between each set of 5 digits 13002 96888 and it should let you proceed.
NOTE: If you are trying to import, click Skip import and key it in manually. This workaround won't work when importing.