HI Amanda,

Your problem sounds identical to mine. Someone from the "Escalations Team" contacted me, and I'm not sure if they did that because of my posting on here or because I begged for my case to be escalated one of the many times I was in a fruitless help session. 

In my case, they discovered that somehow the Payroll Core function in our main QBO account had been marked as "Active" when in fact it was not, we had a separate QBO payroll core company. Once they marked it as "Inactive" it worked and I have been able to export again as before. I hope that helps.