Like Dop2000 says it's impossible to tell without getting more specific information. Plus you don't give the exact steps to reproduce the problem.
I've looked at your project quickly. There are several BIG things you need to do in order to get a cleaner project:
- learn to use the "Else" condition to avoid triggering events by mistake
- avoid nesting "On Start of Layout" triggers below other events. Put them at the top and then state your conditions from there. All the events triggering on start will be better sorted and then it's easier to track where something is going wrong.
- you're doing almost everything "every tick". This is going to be very CPU intensive and lead to errors. For example you're setting some texts and opacities every tick, it is just wrong to do it this way. Try using more functions and triggers. You're also setting "Fullscreen Scaling to High Quality" every tick. Useless.
- do NOT "wait for signal" every tick because this will stack up. If the signal comes ten ticks later, it will trigger ten times !
- similarly do NOT use the "Wait" action every tick. For example if every tick you say : "wait 1 second" then "create an object" il will indeed wait 1 second then it will create an object EVERY frame after that.
If something does not work, try disabling / enabling part of your code, it will show you where you must work. Here I couldn't launch the CarteDeJeu layout, the screen remained black and nothing happened (construct froze because no event was happening after a certain point). I disabled several groups and noticed when I disabled only the group "Menu Pause" it worked, so there is definitely one problem in there. I then disabled parts of the code in this group and I identified that the problem came from this block :
Disabled even more and apparently the problem is not the actions, but the conditions.
Somehow this is fine :
This is not :
I don't know why. Maybe construct loses the scope somehow.
I'll let you or someone else check for the rest.
First thing first you should try to adopt the best practices I've listed above.