Problem with project templates

Hello i wanted to make a project template for openGL,a nd it just crash/ dont appear on menu.

This is my desktop file:
[Desktop Entry]
Name=OpenGL Basic
Comment=Basic OpenGL cube
Category=C++/CMake
Icon=code-context
Type=ProjectTemplate

[General]
Category=C++/CMake
Files=CMakeLists.txt,src,glad,img,shaders,OpenGL_basic.desktop
ProjectFile=CMakeLists.txt

I realy dont know what i do wrong or how to fix this.