javascript - GrapesJS - I can't load saved template from database

<script type="text/javascript">
    var id = document.getElementById('message').value;
    var listeid = document.getElementById('liste').value;

    var editor = grapesjs.init({
        container: "#editor",
        showOffsets: 1,
        fromElement: true,
        height: '100%',
        noticeOnUnload: 0,
        allowScripts: 1,
        autosave: false,
        autoload: 1,
        storageManager: {
            type: 'remote',
            contentTypeJson: true,
            id: 'gjs-',
            autosave: false,
            autoload: true,
            urlStore: '/app/controller/grapesjs_save.php?id=' + id, //POST
            urlLoad: '/app/controller/grapesjs_load.php?id=' + id, //GET
            contentTypeJson: true,
            storeComponents: true,
            storeStyles: true,
            storeHtml: true,
            storeCss: true,
            headers: {
                'Content-Type': 'application/json'
            }
        },
        selectorManager: {
            componentFirst: true
        },
        plugins: ['grapesjs-component-code-editor', 'grapesjs-parser-postcss', 'grapesjs-preset-newsletter',
            'grapesjs-component-countdown', 'grapesjs-custom-code', 'grapesjs-plugin-export'
        ],
        pluginsOpts: {
            'grapesjs-preset-newsletter': {
                modalTitleImport: 'Importer votre template',
                modalTitleExport: 'Exporter le template',
            },
            'grapesjs-custom-code': {
                blockLabel: 'Code personnalis?�',
            },
            'grapesjs-component-code-editor': {
                htmlBtnText: 'Appliquer',
                cssBtnText: 'Appliquer',
                cleanCssBtnText: 'Supprimer',
            },
        },
    });

    /** Ajout de la commande de sauvegarde dans la DB **/
    editor.Commands.add('save-db', {
        run: function(editor, sender) {
            sender && sender.set('active', 0); // turn off the button
            editor.store();
            //storing values to variables
            var htmldata = editor.getHtml();
            var cssdata = editor.getCss();
            var htmlWithCss = editor.runCommand('gjs-get-inlined-html');
            var json = JSON.stringify(editor.getComponents());
            console.log('Complete JSON:', json);
            $.post("/app/controller/grapesjs_save.php", {
                //you can get value in post by calling this name
                "id": id,
                "listeid": listeid,
                "htmlWithCss": htmlWithCss,
                "json": json,
                success: function() {
                    Swal.fire({
                        title: "Email enregistr?� !",
                        icon: 'success',
                        html: "<a href='/app/message.php?test=" + id +
                            "' class='btn btn-sm btn-block btn-primary'><i class='fa fa-eye'></i> Tester le rendu</a>" +
                            "<a href='/app/sending.php?mailid=" + id + "&listeid=" +
                            listeid +
                            "#man' class='btn btn-sm btn-block btn-primary'><i class='fa fa-calendar'></i> Programmer un envoi manuel</a>" +
                            "<a href='/app/sending.php?mailid=" + id + "&listeid=" +
                            listeid +
                            "#auto' class='btn btn-sm btn-block btn-primary'><i class='fa fa-calendar'></i> Programmer un envoi automatique</a>",
                        type: "success",
                        showCancelButton: true
                    });

                },
            });
        editor.on('storage:store', function(e) { console.log('Stored ', e);});  
        },
    });Copy code