Generate VSCode extension fails

[schlaup]

Generating the VSCode extension for the Entity sample fails.

Message: "Generating failed." - no further output

.txconfig:

dsl Entity [ent] {

	general {
		publisher: "test"
		version: "0.0.1"
	}

	paths {
		grammar: "entity/entity.tx"
		outline: "entity/entity.txol"
		coloring: "entity/entity.txcl"
	}
}

Generating the extension for the Workflow or Robot sample works.

Update:

I experimented a bit and this line in entity.txol seems to cause the problem:

label = prop + " : " + type

Changing it to

label = prop

helps to generate the extension successfully.