-Unable to use Compositor in Basic (Built-in) scene, the game view does not render anything.
-NullReferenceException errors are thrown continuously on enabling Compositor.

Steps to repro:
1. Create a new HDRP project.
2. File > New Scene > Basic(Built-in) > Create.
3. Windows > Render Pipeline > Graphics Compositor.
4. Enable Compositor checkbox.

Actual Result:
NullReferenceExceptions are thrown in the console.

Expected Result:
No errors in the console.

Reproducible in:
2020.2.0b9, 2020.2.0b8 with Package version 10.1.0.

Working Fine in:
2020.2.0b9, 2020.2.0b8 with Package version 10.0.0-preview.27.

Note: Package Version 10.1.0 is not available in 2021.1.

Environment:
Occurring on Windows 10 & Mac 10.15.

Stack trace:
NullReferenceException: Object reference not set to an instance of an object
UnityEngine.Rendering.HighDefinition.Compositor.CompositorLayer.SetupLayerCamera (UnityEngine.Rendering.HighDefinition.Compositor.CompositorLayer targetLayer, System.Int32 layerPositionInStack) (at library/packagecache/com.unity.render-pipelines.high-definition@10.1.0/runtime/compositor/compositionlayer.cs:659)
UnityEngine.Rendering.HighDefinition.Compositor.CompositionManager.SetLayerRenderTargets () (at library/packagecache/com.unity.render-pipelines.high-definition@10.1.0/runtime/compositor/compositionmanager.cs:666)
UnityEngine.Rendering.HighDefinition.Compositor.CompositionManager.SetupCompositorLayers () (at library/packagecache/com.unity.render-pipelines.high-definition@10.1.0/runtime/compositor/compositionmanager.cs:388)
UnityEngine.Rendering.HighDefinition.Compositor.CompositionManager.Init () (at library/packagecache/com.unity.render-pipelines.high-definition@10.1.0/runtime/compositor/compositionmanager.cs:312)
UnityEngine.Rendering.HighDefinition.Compositor.CompositionManager.Start () (at library/packagecache/com.unity.render-pipelines.high-definition@10.1.0/runtime/compositor/compositionmanager.cs:330)