I'm sure there may be other reasons, but I had this myself.
What happened, I updated one of the placements in the wireframe, but I did not update my build settings.
This meant that my code compiled and worked when I “started it normally”, but when I ran the tools, it just crashed.
The problem is that the application should have crashed when I started it normally. When I cleaned up my project, the application stopped working and showed me the error message I needed (my infrastructure was not installed correctly).
Therefore, anyone who encounters this should clean your project and then run it. This can crash and give you a problem so that you can fix it.