Angular 9 introduced a global '$localize()' function that needs to be loaded
You need to make sure you have the @angular/localize package first:
npm install @angular/localize --save
Then, import '@angular/localize/init' in your polyfills.ts file just like the error says
The best way if you are using Angular CLI is to run
ng add @angular/localize
It will take care of it automatically
Or else
import '@angular/localize/init'; to your polyfills.ts
Tested with Angular 9
If you have many angular projects in same workspace, running ng add @angular/localizewill add import statement import '@angular/localize/init'to polyfills.ts in default Project only,i think this will be fixed in later updates.
so you need to add import '@angular/localize/init' manually to polyfills.ts in other projects.