@mruknowme Do you have a solution yet. Am having the same issue.

Same problem here. 6.1.0 doesnt work either (different error). I tried to downgrade and got this.

You should to use @angular/pwa@0.6.8. Goodluck!

Sounds similar to #11640 (although the error message is different).

This is due to a new feature in Schematics that you can now return a Rule in a Schematics. Unfortunately, that means some Schematics are not backward compatible.

We will release a patch that will fix this, but in the meantime you can update @angular-devkit/schematics to 0.7.0 and it will fix the issue.

@hansl after updating now I get "Path "/ngsw-config.json" already exist."

Same problem, i thing there is bugs in pwa@0.7.1, you need to use lower version, after that works fine

@hansl I am using @angular-devkit/schematics 0.7.1. I still get same error. @odineshrao I tried installing lower version pwa@0.7.0 but still get same error. Do you know which lower version work proper?

@odineshrao 0.6.8 worked.

Hi guys, with 0.6.8 version I get newTree.optimize is not a function . I couldn't find a solution to this, does anybody have any idea?

The solutions that worked for me in the end was from sksvenson https://stackoverflow.com/questions/51555017/path-ngsw-config-json-already-exists

I had the same issue. I came from Angular 5 and updated to Angular 6.

I use these specific versions to get it work:

npm install --save @angular/cli@6.0.8
npm install --save @angular/pwa@0.6.8

And I had also to remove this entry from angular.json:

"ngswConfigPath": "src/ngsw-config.json"

The solution that worked for me is to downgrade to version 6.0.0.

none of these solution works. how come when i do ng g c cname i get Invalid rule result: Function().

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