form stuck on 'please wait' with using oembed

I have tried it to verify and it just says "please wait" and never goes through. Applicants are frustrated and I don't know how to fix it.

Hello,

Can you please change your embed code from oembed to iframe? If you would like to know how to get the iframe embed code, please follow the steps on this user guide: https://www.jotform.com/help/148-Getting-the-Form-iFrame-Code

Please do let us know if the problem persists.

Thanks.