I can't submit the form

Hello:
I begin release a new game product, and want to submit the game info on web Release Form - Formstack, but failed.
The error is this:

https://epicgames.formstack.com/forms/index.php

ERROR: The security code does not match. (Error ID: 188498a4fef87117c1e1)

1

and the submit web is this:

2

I send email for help, but didn’t work out. Thanks for help.