The Courtyard project displays two shader errors in 5.5.0a3 on import, project cannot start.

1. What happened

Imported The Courtyard project and saw that it has (in addition to missing textures) two new errors that prevent it from starting.

2. How we can reproduce it using the example you attached

- Download/import The Courtyard (or open the attached) project;
- Load the scene and notice that due to the Shader errors the project cannot start.