I’m having problems in my angular angle , when I go from an npm start to that message

Question

This likely Means that the library (@angular/material/snack-bar) which declares Matsnackbar has not been processed correctly by ngcc, or is not compatible with Angular Ivy. Check if a newer version of the library is available, and update if so. Also consider checking with the library’s Authors to see if the library is expected to be compatible with Ivy.

this so my Imports

app.modulets.

import { NgModule } from '@angular/core';

import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { HeaderComponent } from './components/template/header/header.component';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';

import { FooterComponent } from './components/template/footer/footer.component';
import { NavComponent } from './components/template/nav/nav.component'

import { MatToolbarModule } from '@angular/material/toolbar';
import { MatSidenavModule } from '@angular/material/sidenav'
import { MatCardModule } from '@angular/material/card'
import { MatListModule } from '@angular/material/list';
import { MatButtonModule } from '@angular/material/button';
import { MatSnackBar } from '@angular/material/snack-bar'
import { ProductCrudComponent } from './views/product-crud/product-crud.component';
import { ProductCreateComponent } from './components/products/product-create/product-create.component';
import { HomeComponent } from './views/home/home.component'

@NgModule({
  declarations: [
    AppComponent,
    HeaderComponent,
    FooterComponent,
    NavComponent,
    ProductCrudComponent,
    ProductCreateComponent,
    HomeComponent,
  ],
  imports: [
    BrowserModule,
    AppRoutingModule,
    BrowserAnimationsModule,
    MatToolbarModule,
    MatSidenavModule,
    MatListModule,
    MatCardModule,
    MatButtonModule,
    MatSnackBar
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }```

Answer 1

Try adding in package.json "scripts": { "postinstall": "ngcc" }