Just an update. I deleted the page and recreated it, along with completely recreating the form from scratch. I am having the same issue with the error messages and not being able to open the Universal Email interface.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.