I have the same problem. I am contacting the support and waiting for their reply.

Have you solved this problem?

A strange thing is that my apps are still in the market. But when I use a phone to download (with an Apple account of a tester), it says The app is no longer provided, or something like that. However, my backend database shows other users can download and use my apps.

I know it has been a while, but have you found the solutions?

How is your account now? I contacted them by phone, and they found a senior xx to tell me I need to wait for something, and they may email me. Now I am waiting. I suspect this is related to my account previously registered as an individual, but now it was registered as an organization.

我也遇到类似的情况，但是我的证书是自己消失的