Hi,
First thing I noticed, don't use Built in Events to send Events, instead the System Events should be set as Global Events or transition, this is not a good practice and is counter intuitive.
So, don't send an event using "TRIGGER ENTER" for example, instead create your own event for this, like "START TIMER" or something.
Now: It could be that you forgot to add the new scenes to the publish settings, that happens to me too sometimes.
Also, don't wipe or reinstall everything when you encounter an issue, post here first
I never had to reinstall Unity nor playmaker because of any bugs, It's 99.9999% of the case a silly error and wrong set up, or something maybe more serious, but definitly needing to go into such drastic actions
Anyway, I have created a working example that I think is what you are willing to achieve.
start the scene, if you don't press any key, the cube will not fall, and there is a 4 seconds time out to let you load the next scene. Each scene is set to load the next, this is defined in the cube prefab, in the "timer" Fsm under the "Level to load" variable ( available in the inspector)
WARNING: make sure you have added the three scenes in the publish settings.
Study how this was done, If you have any questions, let me know.
Bye,
Jean