Runtime compiler is not loaded with Angular 8 and lazy module

Question

I've created a new Angular 8 project with @angular/cli -> ng new, added a new lazy module, with ng serve is working fine, but with ng build --prod it raises the following error:

Here is my app.module.ts

@NgModule({
      declarations: [
        AppComponent
      ],
      imports: [
        BrowserModule,
        AppRoutingModule
      ],
      providers: [],
      bootstrap: [AppComponent]
    })
    export class AppModule { }

Here is my app-routing.module.ts

const appRoutes: Routes = [
  {
    path: '',
    redirectTo: 'dashboard',
    pathMatch: 'full',
  },
  {
    path: 'dashboard',
    loadChildren: () => import(`./dashboard/dashboard.module`).then(m => m.DashboardModule),
  }
];

@NgModule({
  imports: [
    RouterModule.forRoot(appRoutes)
  ],
  exports: [
    RouterModule
  ]
})
export class AppRoutingModule { }

Here is my dashboard.module.ts

@NgModule({
  imports: [
    DashboardRoutingModule
  ],
  declarations: [
    DashboardComponent,
  ]
})
export class DashboardModule { }

Here is my dashboard-routing.module.ts

const ROUTES: Routes = [
  {
    path: '',
    component: DashboardComponent
  }
];

@NgModule({
  imports: [RouterModule.forChild(ROUTES)],
  exports: [RouterModule]
})
export class DashboardRoutingModule { }

This is my tsconfig.json (default)

{
  "compileOnSave": false,
  "compilerOptions": {
    "baseUrl": "./",
    "outDir": "./dist/out-tsc",
    "sourceMap": true,
    "declaration": false,
    "module": "esnext",
    "moduleResolution": "node",
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "importHelpers": true,
    "target": "es2015",
    "typeRoots": [
      "node_modules/@types"
    ],
    "lib": [
      "es2018",
      "dom"
    ]
  }
}

Answer 1

I think I've solved the issue, the problem was with this line:

loadChildren: () => import(`./dashboard/dashboard.module`)

I was using the backticks, replacing them with the normal single-quote '', it works fine.