I'm no mod, but I often read from them that they changed the website a bit to make it nicer for use with mobile devices and they don't plan to have any app in the future (at least for a longer time) but want the users to view with a web browser.
They might not answer you because you didn't read the older threads in this part of the forum, where they explained it. They do not want to repeat themselves just because somebody wants a personal answer that was given previously to the public.
The plug was pulled months ago, maybe close to a year ago. The app worked for some time longer than I had expected, but then it didn't any longer. But that was the new app. The old one based on tapatalk was terminated years ago. I cannot believe that it still worked for you.
So, face reality, your old way of doing things no longer exists. Use a web browser for Talkbass now.