@enzo_molinari
Then clearly you do not understand the purpose of and your role in the Rhino development process.
The Work-In-Progress builds are made available to license owners for the current shipping version. We give you access to the new, incomplete, and sometimes buggy tools that will be in the next version of Rhino when released. In exchange for this access, we ask that you report problems and thereby extend our development resources resulting in better tools.
Please read this pinned Serengeti post again: