I have not yet gotten a response from HTC.
I googled for some longer time.
Apparently, Facebook broke something and they are trying to fix it.
I am afraid the only thing is to wait.
"Love is wise — Hatred is foolish." In this world, which is getting more and more closely interconnected, we have to learn to tolerate each other. We have to learn to put up with the fact, that some people say things we don't like. We can only live together in that way. But if we are to live together, and not die together, we must learn a kind of charity and a kind of tolerance which is absolutely vital, to the continuation of human life on this planet. - Bertrand Russel