BrowserModule has already been loaded Error

I've managed to solve my problem. One of the libraries i was using was importing the BrowserModule.

I'll just leave the question here in case someone has the same issue.

I think you are using 'NoopAnimationsModule' or 'BrowserAnimationsModule', Which already contain 'BrowserModule' and loading your module lazily. SO the solution is Replace the BrowserModule with 'NoopAnimationsModule or 'BrowserAnimationsModule' in your 'app.module.ts'.

import { Router } from '@angular/router';
import { AdminsModule } from './admins/admins.module';
import { NoopAnimationsModule } from '@angular/platform-browser/animations';
//import { BrowserModule } from '@angular/platform-browser';
import { NgModule,OnInit } from '@angular/core';
import { AppComponent } from './app.component'; 
@NgModule({
    declarations: [
        AppComponent,
    ],
    imports: [
    //BrowserModule,
    NoopAnimationsModule,
    FormsModule
],
    providers: [],
    bootstrap: [AppComponent]
})
export class AppModule {}