This happened last week as well. Cannot purchase shipping labels. Every time I click on Purchase Labels, nothing happens. Please resolve this issue.
Try a screen refresh.
Use Pirateship. I've been using them for 3 years. Easy, cheap, and customer service is great. Disputes & claim with the carrier are resolved thru them and I've always gotten my claim back. I'm not affiliated with them at all just a very satisfied customer.
If you use a screen refresh - make sure you didn't get charged for a label already. But it works. Also a good idea to have a backup plan - I set up Pirateship years ago. These glitches with shipping happened in the past, they will happen again.