Can't resolve all parameters for MatDialogRef angular 4

Remove MatDialogRef from the list of providers.

This isn't a provider, this is a reference to an Object (it ends with Ref)

Hope this helps this is what I have done:

At the component:

import { MatDialog } from '@angular/material';
import { DialogComponent } from './dialogs'; // component name of dialog can add multiple in here.

@Component({
    selector: 'yourComponent',
    templateUrl: './yourComponent.html'
})
export class YourComponent {

  private dialogRef: any;
  constructor(public dialog: MatDialog) {

  openPopup(){
    this.dialogRef = this.dialog.open(DialogComponent , {
                                    width: '250px',
                                    height: '25%',
                                    data: { errorcode: errorCode, errormessage: errorMessage }
                                });
                                this.dialogRef.updatePosition({ top: '3%', left: '20%' });
  }

In the module:

import { DialogComponent } from './dialogs'; // component name of dialog
import { NgModule, CUSTOM_ELEMENTS_SCHEMA, NO_ERRORS_SCHEMA } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { MatDialogModule } from '@angular/material';

@NgModule({
    declarations: [
        DialogComponent 
    ],
    imports: [
        BrowserModule,
        MatDialogModule
    ],
    entryComponents: [
        DialogComponent 
    ],
    schemas: [CUSTOM_ELEMENTS_SCHEMA, NO_ERRORS_SCHEMA]
})

And at last, the dialog(s):

import {Component, OnInit} from '@angular/core';
import { MatDialogRef, MAT_DIALOG_DATA } from '@angular/material';

@Component({
    selector: 'app-dialog',
    templateUrl: './dialog.component.html',
    styleUrls: ['./dialog.component.css']
})
export class DialogComponent implements OnInit {

    constructor(public dialogRef: MatDialogRef<DialogComponent>, 
                @Inject(MAT_DIALOG_DATA) private data: any) { } // this.data.errormessage contain error message. Not sure if need OnInit.

    ngOnInit() {
    } // I have not used this. Instead, I have put the data in HTML and click on buttons from there to interact with the component.

}