Importing the DragDropModule into the app.module

app.module.ts

import { AppComponent } from './app.component';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { BrowserModule } from '@angular/platform-browser';
import { DragDropModule } from '@angular/cdk/drag-drop';
import { NgModule } from '@angular/core';

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