请教如何在zotero里调用第三方javascript

[kangaroolab]

在zotero 7.0, 打开error console, 然后试着运行下面的code:

let doc = window.document;
let s = doc.createElement('script');
s.src = 'https://cdn.jsdelivr.net/npm/scittle@0.6.17/dist/scittle.js';
s.type = 'text/javascript';
doc.documentElement.appendChild(s);

遇到以下错误信息：
Loading failed for the <script> with source “https://cdn.jsdelivr.net/npm/scittle@0.6.17/dist/scittle.jsâ€

请问如何可以正确调用第三方javascript library/module? 多谢