Webform not functioning

I created a webform on my website last year and it worked fine. This year, I added a couple more items to it (I.e. the capability to add a file) and now when you fill it out and click submit the error message pops up. I’ve looked through all of my form details and there shouldn’t be anything prohibiting the form from submitting. Please help.

Here is my site Read-Only: https://preview.webflow.com/preview/tahp-managed-care-conference-trade-show?utm_medium=preview_link&utm_source=designer&utm_content=tahp-managed-care-conference-trade-show&preview=87e4e50e5fe296ca2136c233f1cfb6e8&mode=preview

Can you please share a link to the published site?

Sorry - I thought I had. Here you go! https://www.texascovered.com/sponsorship-registration

Ways to debug.

Check to see if other forms are working on your site. If you don’t have one, create a test page with a test form. If the form fails, open a trouble ticket with support.

If the simple form works; duplicate the sponsorship-registration page, remove all custom code, and third party scripts from the page. Test submission on this duplicated page. If it works, then you need to isolate the issue, by adding back your custom scripts one at a time, testing between each addition.