The Form Fill process aborts if the page does not contain valid HTML structure. The page must contain the <html></html> tags, and the form must contain the <form></form> tags. If these tags are missing, you must correct the source page on the web server. If this is not possible, you can create a rewriter policy to add the tags.
To add the <html> tag, have the rewriter policy search for the <body> tag, and replace it with <html><body>.
To add the </html> tag, have the rewriter policy search for the </body> tag, and replace it with </body></html>.
Use similar entries to add the <form></form> tags. You’ll need to discover which tag or phrase starts and stops the form.
Configure your rewriter policy so that it runs before the default rewriter policy. For more information about rewriter policies, see Section 2.7.6, Configuring HTML Rewriting.