Issue
I receive an HTTP Error 404.0 Not Found or Bad Request error message when launching a new request.
Solution
Make sure the FORM_URL parameter contains the correct file path to your web project and that you are using forward slashes (/) in your URL, and not backslashes (\) .
For example, your FORM_URL parameter should look similar to the following:
/wfgen/wfapps/webforms/MyProject/v1/default.aspx
and not:
\wfgen\wfapps\webforms\MyProject\v1\default.aspx