I am trying to put a page together that accepts a form submission. The only form I've seen on Nicepage is a contact form, which is fine. I've changed submit from e-mail to URL. That submission does a post to a URL where I process the information. I can see the call coming through my server and everything seems ok, however, after code finishes, the page simply shows: "Unable to send your message. Please fix errors then try again.". I don't know if this only accepts email pages, or if it's expecting some response that I'm not returning. Confused as there's no documentation that says how to process forms using Nicepage apps.