Our form is not submitting when embedded on WordPress

To Whom It May Concern:

I've attached below of the URL and screenshot of where we are having trouble with a submission form. The form is for "Article Submission Guidelines" in a red box at the very bottom of the page. When our clients have tried submitting their form, they click to submit only for the button to change into spanish, "aguarde" which means "waiting". We've personally tested submitting articles ourselves and found similarly, that none of the forms have been able to submit because it gets stuck here. Let us know what we need to do to solve the issue. Thank you in advance. 

Our apologies. It seems to be an issue with oEmbed feature in WordPress. Please re-embed the form using our default Javascript or iFrame method.

https://www.jotform.com/help/67-Which-Form-Embed-Code-Should-I-Use