ng add @ngrx/store -> Unexpected token / in JSON at position 173

[PooSham]

Minimal reproduction of the bug/regression with instructions:

When I run ng add @ngrx/store, I get the following error:

Unexpected token / in JSON at position 173

and StoreModule is not added to my imports in the app module.

Versions of NgRx, Angular, Node, affected browser(s) and operating system(s):

Here's the output from ng version

Angular CLI: 9.0.1
Node: 10.16.2
OS: win32 x64

Angular: 9.0.0
... animations, cdk, common, compiler, compiler-cli, core, forms
... language-service, localize, platform-browser
... platform-browser-dynamic, router
Ivy Workspace: Yes

Package Version

@angular-devkit/architect 0.900.1
@angular-devkit/build-angular 0.900.1
@angular-devkit/build-optimizer 0.900.1
@angular-devkit/build-webpack 0.900.1
@angular-devkit/core 9.0.1
@angular-devkit/schematics 9.0.1
@angular/cli 9.0.1
@ngtools/webpack 9.0.1
@schematics/angular 9.0.1
@schematics/update 0.900.1
rxjs 6.5.3
typescript 3.6.4
webpack 4.39.1

I would be willing to submit a PR to fix this issue

[ ] Yes (Assistance is provided if you need help submitting a pull request)
[ X ] No

[timdeschryver]

I hope #2455 fixes this issue.
When a new version is released, I will give it a spin and see what happens.

[timdeschryver]

@PooSham we just release v9.1 and this issue seems to be resolved.
If this is not the case, fee free to reopen this issue.

[PooSham]

I still get this issue in v9.1