Hello,
Thank for your Patience.
We have just checked out your Website remotely and it appears to be working fine but you are using the Older Version of the PHP Files that processes the Forms. But we have upgraded the way we handle Form Responses in the Latest Version of Canvas. Please use the Latest Version of the PHP Files and also simply change the action="include/jobs-file.php" to action="include/jobs.php" in the <form> Tag since the include/jobs.php File will handle this Form just fine.
Additionally, we have also noticed that you have added some Inline JS in the middle of the Page which is not recommended as in the Latest Versions of Canvas you are required to move all the Inline JS Codes at the bottom of the Page just after the js/functions.js JS File Linking. Also, the Contact Form's Inline JS Code is not required since it is already being handled by the js/functions.js File. Please make sure that you have properly followed the Upgradation Instructions provided in the Documentation > Upgrade v3.x to v4.0 Section.
This will definitely work fine. Let us know if we can help you with anything else or if you find any further issues.