StateTree Changes at 5.6 version

Hi!
Anyone k now what was the changes in the State Tree Functionality for the 5.6 versuion?
I use State Tree (Working) but today i install the 5.6 version and many wierd behaviours start, like
State Tree Tick stop to work, and the transitions not happen…

Can anyone help with this?

Kind Regards.
Williäm Wolff