There is a code; https://www.ursinaengine.org/fps.html
I use usrsina’s code to check if this problem is still and it is.
This say something like; “DirectionalLight” is not defined also
“application” is not defined,
“destroy” is not defined
“distance_xz” is not defined
“invoke” is not defined
“invoke” is not defined
“BoxCollider” is not defined

Any one know how to fix it ?

I try to reinstall but that doesn’t help. I’m expecting that someone will help me with fixing this bugs for exemple; You need to install …and then use …