I have been using the forms and testing successfully and receiving forms from users. However, today I was notified that a user is receiving a 403 Permission Denied message when they hit submit on the form found here: http://ifcochiro.org/membership-application/
I tested it on my end and it worked fine. They have tried it in IE, Chrome and Firefox with the same error.
Could you please advise on how to fix this and why it may be happening?