Black Skybox in Play Mode when using META XR SDK v77 [Building Block Camera Rig]

In META XR SDK version 77, when adding the [BuildingBlock] Camera Rig, there is a configuration issue that causes the Skybox to appear black when entering Play Mode.

Steps to Reproduce:

Create a new project with META XR SDK v77.
Add the [BuildingBlock] Camera Rig to the scene.
Press Play.
Observe that the Skybox is black instead of rendering normally.

Cause:
The Camera components inside the Camera Rig are set with the Background Type set to Solid Color (black) instead of Skybox... So set it to Skybox

Solution / Workaround:

1. In the Hierarchy, locate and expand [BuildingBlock] Camera Rig.
2. Expand TrackingSpace, then CenterEyeAnchor.
3. Select the Camera component, expand the Environment section.
4. Change Background Type to Skybox.
5. (If necessary) Repeat the process for LeftEyeAnchor and RightEyeAnchor

Notes:
It’s surprising that in v77 this detail was overlooked, considering that in previous META examples they used a different Camera Rig configuration without this problem. The issue seems to stem from the updated default configuration of [BuildingBlock] Camera Rig in v77.