Hello
In addition to Joachine, you need to change setting for ORD_CLOSE, seems like as of now order is getting closed after goods movement.
Then maintain proper status for action BILLING_CREATE (when it should allow to create billing for order)
Also, please check setting for BILLING_CREATE event, what you maintained under Buttons
To Display button Screen - Dynamic Button on Screen
If you changed setting, then let us know f you seeing billing create button / event or not