Component not showing

[quardz]

Angular 9, There is no error/warning in console log, component not appearing in inspect element.
What would be wrong.
My ts file :

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

import { serialize, parse } from '@wordpress/blocks'
import { NgGutenbergModule,IBlock } from 'ng-gutenberg'

@component({
selector: 'app-testcomp',
templateUrl: './testcomp.component.html',
styleUrls: ['./testcomp.component.scss']
})
export class TestcompComponent implements OnInit {

blocks: IBlock[];

constructor() { }

onBlocksChanged(item: IBlock[]) {
var html = serialize(item);
}

ngOnInit(): void {
}

}

// My HTML file
<block-editor-provider [blocks]="blocks" contentClass="gutenberg__editor">

[arnvanhoutte]

Did you import @import "ng-gutenberg/ng-gutenberg" in your styles?

[quardz]

Error throws If i import styles.