Invalid rule result: Instance of class Promise

Question

I work with Angular 7.1.4. I want to generate a new module with the following line;

ng g m order-process

But I encountered an error:

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Answer 1

Try to install the CLI version 6.0.8 and then install in a clean project try ng add @angular/pwa@0.6.8

Seems like the error hasn't been solved by the core team so in the meanwhile we have to use a lower version