blocked by cors policy No 'Access-Control-Allow-Origin' header is present on the requested resource

hello i'm using  grapesjs with vue wrapper i'm unable to load a webpage using urlLoad: of grapesjs im facing cors issue,i'm pretty new to grapesjs please help me out Thanks in advance .
here is my code
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import grapesjs from 'grapesjs';

import 'grapesjs/dist/css/grapes.min.css';
import 'grapesjs-preset-newsletter/dist/grapesjs-preset-newsletter.css';
import 'grapesjs-preset-webpage/dist/grapesjs-preset-webpage.min.css';

import gjspresetnewsletter from 'grapesjs-preset-newsletter';
import gjspresetwebpage from 'grapesjs-preset-webpage';

    export default {
        data() {
            return {
                editor: null
            }
        },
        methods: {
            change() {
                this.$emit('change', this.editor.getHtml());
            },
        },
          mounted() {
                const LandingPage = {
                components: null,
                style: null,
                };
                this.editor = grapesjs.init({
                container: "#gjs",
                canvas: {
                     styles: [""],
                },
                fromElement: true,
                components:'',
                style: '',
                plugins: [],
                pluginsOpts: {
                    "gjs-preset-webpage": {}
                },
                 storageManager: {
                    type: 'remote',
                    stepsBeforeSave: 10,
                    urlStore: '',
                    urlLoad: 'https://grapesjs.com/docs/modules/Storage.html#setup-the-server',
                    params: {}, 
                    contentTypeJson: true,
                    headers: {
                        'Content-Type': 'application/json'
                    },
                     json_encode:{
                         'gjs-components': [],
                          'gjs-style': [],
                     }
                    
                    },
                });
                this.editor.load=(res => console.log('Load callback'));
        }
    }