Missing scripts in Unity 6

Unity: SRP Templates

URP

Package Samples

6.5.X

6000.5.0a1

6.4.X

6.3.X

6.2.X

6000.2.11f1

6.0.X

6.1.X

Cancelling: the 6000.1 version has reached its end of life. If you need additional fixes, please upgrade to a newer Unity version.

Steps to reproduce:

Create a new Universal 3D project.
Open Window > Package Manager > Universal RP.
Click "Samples" tab and click "Import" next to URP Package Samples.
You may have to change the Render Pipeline Asset according to the instructions in Game View.
Enter play in the following sample scenes:
- CameraStacking > MixedFOV
- Shaders > Lit

Actual results: Missing script warnings when play mode is entered.

Expected results: No warnings.

Reproducible with versions: 6000.0.1f1, 2023.3.0a2

Not reproducible with versions: 2023.2.20f1, 2022.3.28f1, 2021.3.38f1

Can't test with versions: 2023.3.0a1, unable to install

Tested on (OS): macOS (Intel) 12.7.4

Notes:

See [Internal link] for all the issues with the URP package samples.
See also linked [Internal link] for missing scripts in the package samples that occur in Unity 6 but also 2022.3.