This can be confirmed by selecting Form Submission Errors in the Crawl Results filter criteria.

If you access a page that has a form submission error, you will see an error message.

AeyeScan detects these and other error messages and determines that it is a form submission error.

You can check for errors in the following ways

Scan Details or Scan List>Hamburger Menu>Check Crawl Results>Filter Criteria>Select Form Submission: Error and click the Apply Filter button.