Form submissions randomly stopped working

My form submissions have been working, no problem, since my site launched in February.

This morning, I attempted to add a reCAPTCHA to my form fields, was receiving site key errors although they were correct. Rather than have temporarily broken forms on my site while the site keys were potentially still registering (up to 30 minutes), I restored my site to a previous version when all was working. After restoring, my forms now give the following error message although all form fields are correctly filled: “Oops! Something went wrong while submitting the form. Please make sure that all form fields have been filled in and that your email address is correct.”

What happened and how can I fix it?

Thank you!

Here is my site Read-Only: (Webflow - ktdid.)