In order to fix this, you can use one of the following options:
Option A — You can re-create the form without marking any fields as required
Option B — Download the form (via File Manager feature or via FTP from /media)
Open file in text/code/html editor (rename file to ‘.html’ if your editor can’t open as ‘.form’). At the top of the code, you should see something like this:
This field is submitted with the form to let the system know which fields to “require” (separated by semicolons). Each of the fields listed in this tag’s ‘value=’ must match a ‘name=’ of one of the fields within the form.
If you can spot a mismatch, then that may well be what’s causing the problem, and you can just correct the typo to fix it. Otherwise, just rip out the entire “required_fields” tag. The fields won’t actually be “required”, but they’ll look like they are to the customer’s visitors…and the form will work.
Then just upload the file to the site (make sure .form extension is preserved). If you have already put the form on a page. One of you will need to just open that page and re-save it (just ‘Open/Edit’ –> ‘Save’ –> done).