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

Run npm install @schematics/angular@7.0.7 --save-dev replace version with the same as your @angular/cli (in this scenario, 7.0.7)

Answer 2

My problem was that my node version was on 8.x.x but angular >= 8.x.x requires a node version >= 10.x.x

Im using nvm to change node version. Install it with like so (check link for windows usage)

curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.35.2/install.sh | bash

after installation install node version 10.x.x

nvm install 10

then switch in terminal like this

nvm use 10

Answer 3

Deleting existing package-lock.json and node_modules directory helped me running the ng new command without error

Answer 4

Try to generate a blank new project and check if you get the same error there too when creating a module using the CLI.

If you do, then I'd recommend to re-install angular.

Answer 5

Had this issue while using Using: @angular/cli 8.1.1, @angular-devkit/schematics 8.0.1, Node v8.9.4, Upgrading to Node 10 fixed it.

Answer 6

There seems to be an issue with the angular schematics- use npm install --save @angular/pwa@0.6.8

Also you can try lowering the pwa version if you face further issues.

The issue thread on github- https://github.com/angular/angular-cli/issues/11663