World Terrain is rendered without texture (Unity Quickstart)

1. Install Unity Hub 3.4.2 and Unity 2021.3.25f1.

2. Follow the 'Cesium for Unity Quickstart" guide,
https://cesium.com/learn/unity/unity-quickstart/

3. When creating the new project, use the "3D Sample Scene (URP)" template.

4. When installing Cesium for Unity, select version 1.2.0.

6. Continue with the tutorial until you add "Cesium World Terrain + Bing Maps Aerial imagery".

Notice that the world terrain geometry appears, but there is no texture. It is flat grey.

Also of note, if you repeat the same steps, but in step 3 use the "3D Sample Scene (HDRP)" template instead, everything seems to work fine.