Invalid certificate hash

[git4sastra]

I've continued working on a project where I will make use of Figo API. Before it was working, but now I receive an SSL error stating certificate's invalid. So certificate validation seems not to work with latest hash (used here in console demo source file Program.cs line ?40?) anymore.
Did they change? If so where are they coming from and where can we check for latest, correct and secure values on our own?