HttpErrorResponse cannot access _listId from mongo db by using params ANGULAR

Question

I am a beginner and i am following this tutorial (https://www.youtube.com/watch?v=aOkAx1jZokc&list=PLIjdNHWULhPSZFDzQU6AnbVQNNo1NTRpd&index=5) on creating a task manager application with Angular. At around 26:00 we access listID via "params._listId" .In current version of Angular you can no longer access listId this way. In the comments of that video somebody suggests to use "params?.['_listId'] but that cause mongo db to crash and it gives me a httperror response :

ERROR HttpErrorResponse {
  headers: _HttpHeaders {
    normalizedNames: Map(0) {},
    lazyUpdate: null,
    headers: Map(0) {}
  },
  status: 0,
  statusText: 'Unknown Error',
  url: 'http://localhost:3000/lists',
  ok: false,
  name: 'HttpErrorResponse',
  message: 'Http failure response for http://localhost:3000/lists: 0 Unknown Error',
  error: ProgressEvent2 {
    type: 'error',
    target: XMLHttpRequest2 {
      onloadstart: null,
      onprogress: null,
      onabort: null,
      onerror: null,
      onload: null,
      ontimeout: null,
      onloadend: null,
      _listeners: [Object],
      onreadystatechange: null,
      _anonymous: undefined,
      readyState: 4,
      response: null,
      responseText: '',
      responseType: 'text',
      responseURL: '',
      status: 0,
      statusText: '',
      timeout: 0,
      upload: [XMLHttpRequestUpload],
      _method: 'GET',
      _url: [Url],
      _sync: false,
      _headers: [Object],
      _loweredHeaders: [Object],
      _mimeOverride: null,
      _request: null,
      _response: null,
      _responseParts: null,
      _responseHeaders: null,
      _aborting: null,
      _error: null,
      _loadedBytes: 0,
      _totalBytes: 0,
      _lengthComputable: false
    },
    currentTarget: XMLHttpRequest2 {
      onloadstart: null,
      onprogress: null,
      onabort: null,
      onerror: null,
      onload: null,
      ontimeout: null,
      onloadend: null,
      _listeners: [Object],
      onreadystatechange: null,
      _anonymous: undefined,
      readyState: 4,
      response: null,
      responseText: '',
      responseType: 'text',
      responseURL: '',
      status: 0,
      statusText: '',
      timeout: 0,
      upload: [XMLHttpRequestUpload],
      _method: 'GET',
      _url: [Url],
      _sync: false,
      _headers: [Object],
      _loweredHeaders: [Object],
      _mimeOverride: null,
      _request: null,
      _response: null,
      _responseParts: null,
      _responseHeaders: null,
      _aborting: null,
      _error: null,
      _loadedBytes: 0,
      _totalBytes: 0,
      _lengthComputable: false
    },
    lengthComputable: false,
    loaded: 0,
    total: 0
  }
}
ERROR HttpErrorResponse {
  headers: _HttpHeaders {
    normalizedNames: Map(0) {},
    lazyUpdate: null,
    headers: Map(0) {}
  },
  status: 0,
  statusText: 'Unknown Error',
  url: 'http://localhost:3000/lists/undefined/tasks',
  ok: false,
  name: 'HttpErrorResponse',
  message: 'Http failure response for http://localhost:3000/lists/undefined/tasks: 0 Unknown Error',        
  error: ProgressEvent2 {
    type: 'error',
    target: XMLHttpRequest2 {
      onloadstart: null,
      onprogress: null,
      onabort: null,
      onerror: null,
      onload: null,
      ontimeout: null,
      onloadend: null,
      _listeners: [Object],
      onreadystatechange: null,
      _anonymous: undefined,
      readyState: 4,
      response: null,
      responseText: '',
      responseType: 'text',
      responseURL: '',
      status: 0,
      statusText: '',
      timeout: 0,
      upload: [XMLHttpRequestUpload],
      _method: 'GET',
      _url: [Url],
      _sync: false,
      _headers: [Object],
      _loweredHeaders: [Object],
      _mimeOverride: null,
      _request: null,
      _response: null,
      _responseParts: null,
      _responseHeaders: null,
      _aborting: null,
      _error: null,
      _loadedBytes: 0,
      _totalBytes: 0,
      _lengthComputable: false
    },
    currentTarget: XMLHttpRequest2 {
      onloadstart: null,
      onprogress: null,
      onabort: null,
      onerror: null,
      onload: null,
      ontimeout: null,
      onloadend: null,
      _listeners: [Object],
      onreadystatechange: null,
      _anonymous: undefined,
      readyState: 4,
      response: null,
      responseText: '',
      responseType: 'text',
      responseURL: '',
      status: 0,
      statusText: '',
      timeout: 0,
      upload: [XMLHttpRequestUpload],
      _method: 'GET',
      _url: [Url],
      _sync: false,
      _headers: [Object],
      _loweredHeaders: [Object],
      _mimeOverride: null,
      _request: null,
      _response: null,
      _responseParts: null,
      _responseHeaders: null,
      _aborting: null,
      _error: null,
      _loadedBytes: 0,
      _totalBytes: 0,
      _lengthComputable: false
    },
    lengthComputable: false,
    loaded: 0,
    total: 0
  }
}`

Here is my task-view.component.ts code:

import { Component, OnInit } from '@angular/core';
import { TaskService } from '../../task.service';
import {ActivatedRoute, Params} from '@angular/router';

@Component({
  selector: 'app-task-view',
  templateUrl: './task-view.component.html',
  styleUrl: './task-view.component.scss'
})
export class TaskViewComponent implements OnInit {
  lists!: any[];
  tasks!: any[];
  
  constructor(private taskService: TaskService, private route: ActivatedRoute) {}

  ngOnInit() {
    this.route.params.subscribe(
      (params: Params) => {
        console.log(params);
        //this.taskService.getTasks(params?.['_listId']).subscribe((tasks: any) => {
        //this.tasks = tasks;
        //})
       
        
      }
    
      
    )

      this.taskService.getLists().subscribe((lists: any) => {
      this.lists = lists;
      console.log(lists);
      })

  }

  

}

commented lines is what causes the issue. I tried changing "params._listId" to params?.['_listId'] but that causes mongo db to crash. I am sorry if i wasnt clear enough i am a beginner to these things.