I have created a new angular project. Then I add
Path "/ngsw-config.json" already exist.
In angular CLI version is 6.1.1.
Invalid rule result: Function().
In angular CLI version is 6.0.3
Try to install the CLI version 6.0.8 and then install in a clean project try ng add @firstname.lastname@example.org
Seems like the error hasn't been solved by the core team so in the meanwhile we have to use a lower version