ng add @angular/elements nom ERR! Failed at the document-register-element@1.14.3 postinstall script.

[mcleangm]

🐞 Bug report

Command (mark with an x)

• [ x] add

Is this a regression?

Unknown

Description

ng add @angular/elements package install failed

🔬 Minimal Reproduction

On Mac/OSX 10.14.6

🔥 Exception or Error

Installed packages for tooling via npm.
Added document-register-element as a dependency.
Added document-register-element.js polyfill to scripts
UPDATE package.json (1376 bytes)
UPDATE angular.json (3790 bytes)

document-register-element@1.14.3 postinstall /Users/gord/Developer/angular-workspace/projects/pravinkumar-dabade/angular7:8-elements/ng-elements/hello-world2/node_modules/document-register-element
lightercollective

sh: lightercollective: command not found
npm ERR! code ELIFECYCLE
npm ERR! syscall spawn
npm ERR! file sh
npm ERR! errno ENOENT
npm ERR! document-register-element@1.14.3 postinstall: lightercollective
npm ERR! spawn ENOENT
npm ERR!
npm ERR! Failed at the document-register-element@1.14.3 postinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! /Users/gord/.npm/_logs/2019-11-09T15_01_48_051Z-debug.log
Package install failed, see above.

🌍 Your Environment

Node: 12.13.0
Npm: 6.11.3

Angular CLI: 8.3.18
Node: 12.13.0
OS: darwin x64
Angular: 8.2.13
... animations, common, compiler, compiler-cli, core, elements
... forms, language-service, platform-browser
... platform-browser-dynamic, router

Package Version

@angular-devkit/architect 0.803.18
@angular-devkit/build-angular 0.803.18
@angular-devkit/build-optimizer 0.803.18
@angular-devkit/build-webpack 0.803.18
@angular-devkit/core 8.3.18
@angular-devkit/schematics 8.3.18
@angular/cli 8.3.18
@ngtools/webpack 8.3.18
@schematics/angular 8.3.18
@schematics/update 0.803.18
rxjs 6.4.0
typescript 3.5.3
webpack 4.39.2

Anything else relevant?
npm install @angular/elements completes without error where as ng add @angular/elements throws an error?

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