Your certificate chain is fine. The LetsEncrypt root certificate expiration led to many small issues worldwide. This is one of them. It’s up to FB to fix this, they are seeing a false negative.
3 Mi Piace
once you fix the ssl cert problem, get them to review the case and then they will enable your app again.
1 Mi Piace
Problem is, there is nothing to fix on forum side of things.
Thanks guys!
I am throwing that SSL A+ report and explanation back at Facebook.
3 Mi Piace
That sounds like an issue on their side with the update to the root certificate. And the people who check don’t have enough tech sense to know that.
1 Mi Piace
This topic is also relevant.