Hello,
We have just checked out your Website and the Form Processor is returning a 500 Internal Server Error: https://www.provablyprotect.com/include/form.php which is an indication that this is a Server Configuration issue.
Firstly, please make sure that your PHP Version is more than 5.6 or preferably the Latest Version.
If you are still facing further issues, the please consider adding the .customjs Class to the .form-widget Element and then following code at the very top of your include/form.php File:
[ch_pre type="php"]error_reporting(E_ALL);[/ch_pre]
which should display all the possible errors. Please notify us about the Error Message you see, after going through the process above, so that we can provide you with more assistance on this. Thanks for your Patience!
Meanwhile, do let us know if we can help you with anything else or if you find any further issues with Canvas.