How to fix Error: Type FroalaEditorModule does not have 'ngModuleDef' property Using Froala Wysiwyg

I'm following the instructions at Angular Froala WYSIWYG Editor and I'm using angular version 8.3.26.

app.nodule...

import { FroalaViewModule, FroalaEditorModule } from 'angular-froala-wysiwyg'

imports: [  
    ...
    FroalaViewModule.forRoot(), FroalaEditorModule.forRoot()
], 

I'm getting and error when I run the application:

Error: Type FroalaEditorModule does not have 'ngModuleDef' property.

How do I fix that?

from How to fix Error: Type FroalaEditorModule does not have 'ngModuleDef' property Using Froala Wysiwyg