I want to learn three.js and tried following the getting started code on the three.js documentation, but the scene isn’t rendering, and I am completely stumped.

In this code, a Three.js 3D scene is created with a perspective camera positioned above the scene, allowing for an immersive view of the objects. A WebGL renderer is initialized to display the graphics on the webpage, and the renderer’s canvas is appended directly to the body for visibility. A Computer class instance is used to render HTML content, including a button and a paragraph, on a CSS3D screen, which is positioned at the center of the scene. Additionally, a green cube is added to the scene as a 3D object. To enhance user interaction, OrbitControls are implemented, enabling the camera to orbit around the scene based on mouse movements, with damping for smoother transitions. An animation loop continuously updates the controls and renders the scene, providing a dynamic and interactive 3D experience.

i wanna import certain library to the html file using script but some links do not work. i dont know where to find the new version.
[enter image description here](https://i.sstatic.net/81yBvKTK.png) [enter image description here](https://i.senter image description herestatic.net/rqOOGkZ1.png)