The community login is not the same as your account login, so be sure you are using the correct one.
I have the same problem today. My wifes line failed autopay a few days ago. My friends line failed autopay yesterday. My other friends line failed autopay just over a week ago. Some of these lines are over a year in service with Public, so it appears to be a new system issue and quite widespread.
To get your service working, go to manual pay, somewhere on the screen at bottom is manage payment card, get to the screen to remove or replace credit card. Replace the credit card with a different one, or perhaps a visa debit card. Then do a manual payment for one or two dollars more than needed to renew. This has worked to reactivate service and the key is to change the payment card and do a manual payment.
note: When I tried to do a manual payment with the existing card on file, it failed. In my case it indicates that it might fail due to frequent attempts. Other people had similar messages.
I'd suggest to check your payment history a few days after making payment. On my friends line, the system billed him a second time for the same month and automatically took payment. We notified customer service but still waiting for the credit. Autopay is awful in terms of reliability.
