I think there is a large ongoing issue with Bluebird Billpay.
I have a new account (opened about a week ago) and I have added all my CC accounts to billpay without problems. I have also successfully payed two CC bills this way. I also wanted to add my landlord, so I could pay rent via BB. Every time I try that, it tells me they are having "technical difficulties" and gives me a number to call. I called and the guy on the other end told me they have a trouble ticket open for weeks and it is being worked on. He also suggested I tried mobile bill pay, which for me failed in the same way.
As all of the payments that work for me are for large companies (banks mainly) and they happen via ACH, I have a feeling that non-ACH (i.e. check) billpay is broken. They have intentionally disabled adding of new non-ACH payees because of that.
For those of you who have issues, what kind of bill are you trying to pay? Who is the payee?