app-angular has runtime error on start

[bigfish]

Steps to Repro:

1. Clone repo

2. npm install

3. lerna bootstrap

4. build component-library

5. build component-library-angular

6. 'npm start' app-angular

7. Open http://localhost:4200 in Chrome (80)

8. See following error in console (twice)

AppComponent.html:3 ERROR NullInjectorError: StaticInjectorError(AppModule)[DemoComponent -> ChangeDetectorRef]: StaticInjectorError(Platform: core)[DemoComponent -> ChangeDetectorRef]: NullInjectorError: No provider for ChangeDetectorRef! at NullInjector.push../node_modules/@angular/core/fesm5/core.js.NullInjector.get (http://localhost:4200/vendor.js:89853:25) at resolveToken (http://localhost:4200/vendor.js:101046:24) at tryResolveToken (http://localhost:4200/vendor.js:100990:16) at StaticInjector.push../node_modules/@angular/core/fesm5/core.js.StaticInjector.get (http://localhost:4200/vendor.js:100892:20) at resolveToken (http://localhost:4200/vendor.js:101046:24) at tryResolveToken (http://localhost:4200/vendor.js:100990:16) at StaticInjector.push../node_modules/@angular/core/fesm5/core.js.StaticInjector.get (http://localhost:4200/vendor.js:100892:20) at resolveNgModuleDep (http://localhost:4200/vendor.js:109362:29) at NgModuleRef_.push../node_modules/@angular/core/fesm5/core.js.NgModuleRef_.get (http://localhost:4200/vendor.js:110033:16) at resolveDep (http://localhost:4200/vendor.js:110404:45)

9. Despair :(

I have looked into related issues, but their suggested solutions either didn't work, or the issue was closed without solution.