PointLight not casting shadow

I have set the appropriate meshes to have .castShadow and/or .recieveShadow to be true/false and checked at the shadow camera. The shadow camera covers part of the map for now, but even the parts covered by shadowCamera don’t render a shadow.

Here is the part of the code where I create shadows:

    const renderer = new THREE.WebGLRenderer();
    renderer.setSize(window.innerWidth, window.innerHeight);
    renderer.shadowMap.enabled = true;
    renderer.shadowMap.type = THREE.PCFSoftShadowMap;

    const pointLight = new THREE.PointLight(0xffffff, 0.6);
    pointLight.position.set(0, 10, 4);
    pointLight.castShadow = true;

    const helper = new THREE.CameraHelper(pointLight.shadow.camera);

And the script.js where this code comes from:
script.js (46.5 KB)
The castShadow/recieveShadow are set in the initializeFloor() and createWalls() functions.
What is wrong with my code? Since I don’t see any deviation from the examples in the three.js website…