The start of my project does not work!

the start of my project does not work!
When i start ue4 it starts my when i start the project it asks me to rebuild it i do “YES” my walk it and he tells me my me I’m not an expert ducoup I know not or and the broblem (I am a child and I worked for 1 month silvouplait help me).

you are going to need to explain this more as in in more detail and in more readable english. as it stands now its almost impossible to read and parts are in french.