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I think we still have an existing issue with our oEmbed plugin. If you will check your browser console, you'll find an error that is causing this.
I have forwarded this to our developers. If there are updates, you should know it through this thread.
For now, please use our Embed Form plugin: https://wordpress.org/plugins/embed-form/. Or, simply embed your form using one of our embedding methods. I would recommend the iframe: https://www.jotform.com/help/148-Getting-the-Form-iFrame-Code.