Hello,
Again, as we have already mentioned in our earlier replies, the Codes on your Website used for the Contact Forms are using an Older Version of Canvas which is why the Form does not work as expected. Please update your Forms to the Latest Version of Canvas using the codes from the Latest HTML Files. Also check all the Setup Details in the Documentation > Forms Section.
According to the error notification you are getting, you will need to add the following code inside your <form> Tags:
Following the Steps above will fix your issues. Hope this Helps!
Let us know if we can help you with anything else or if you find any further issues.