We encountered an error for your return waybill download. Please try again

The link to create a waybill return label isn't working. When I enter my account number, it returns an error:
https://www.telus.com/en/bc/return-label/4000477798474319-1637019274462051

We encountered an error for your return waybill download. Please try again

I've tried this on every machine, cellphone, and I still cannot get a return label.