Telegram Widget Not Displaying on Home Page

I confirmed my Telegram server and Bot work, and port 3000 is open, but the Telegram widget is not displaying on my Ghost home page, using the code below in Code Injection. Appreciate any suggestions.

<!-- Telegram Widget -->
<script async src=""
        data-auth-url="" <!-- Update with your server's URL -->

What error(s) appear when you inspect the browser’s console log. (In Chrome: F12 and click the console tab)

The page is in Quirks Mode due to

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