Feedback Unity Build Fails - Quite Early in the Project Unity 2021.3.23f1

We cannot tell what is causing the build to fail. About 3/4 of the way through. Any ideas?

It's a fairly new project; this is the first build. It has a custom shader, runs fine in the editor. It also uses Edy's Pro Vehicles, but the same thing happens when there are only the meshes and textures.

Ran command line build, also dies, here is the log.