IA caracter randomly not moving ... i ve try every thing

hi, i m not so very new to programming PHP c++ vb.net MYSQL … blender and so
but i m developing a game to improve my knowledge.

I created various projects in third person, randomly in some the same code makes the character move in others not, in this one for example I can’t make it move, and fixed as spawn or fixed in the world but nothing, does anyone know how I can solve it? thanks