Soon, the old skill tree builder will be sent to a museum, displayed behind glass.

It's already been done (scroll back in the thread). Download the latest version. It builds skill trees and also searches for the desired skill set. You need a log file + the game data - and there you go.

In addition, there is an exploration mode, i.e., you can build any of the 255 skill trees.

Added 2 minutes later

To complete the analysis, we just need to explain where the bug comes from that causes the game to crash when clicking on the "first aid" skill.

I haven't heard of that. Describe the issue.

The game sometimes crashes, seemingly for no apparent reason. The last time I noticed it was when I tried to place the second Grail.