Template loaded via remote storage is not displayed in the editor

Hi, I am trying to load a default template from remote storage into the editor but nothing is displayed. As part of of the initialization I have this code: storageManager: { type: "remote", autosave: true, autoload: true, stepsBeforeSave: 3, urlStore: "https://myendpoint/lib/remotestorageloadtemplate.php", urlLoad: "https://myendpoint/lib/remotestorageloadtemplate.php", params: {}, contentTypeJson: true, }, This is the PHP code from my urlLoad: header('Content-Type: application/json'); $html = '<div class = "hero">Hello world</div>'; $css = '{color:red;} body{width:100%;}'; $arr = array( 'gjs...