Hello,
Thanks for your Patience!
We have tried checking out the Codes you have provided us with and there appears to be no error with the Codes. However, we are definitely getting an error with the SMTP Connection. Please make sure that you are using the Proper Port/Host URL/Username/Password Combination to avoid any issues. We are also getting a Blank Response from the Servers when checking your Form PHP File: https://www.lesjardins-dejean.be/include/form.php which should not be happening if you are using the default files and the PHP File should display some sort of message. Please make sure that the Files are updated online. Additionally, if you are still facing further issues with this after making , please consider making the following tests:
Add .customjs Class to the .form-widget Element.
Submit the Form and provide us with the Error Message contents here so that we can make further investigations in relation to this issue.
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.