Angular 9 Introduced A Global '$localize()' Function That Needs To Be Loaded
Answer : 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/localize will 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.