CSRF Error - Invalid csrf_token.

After running a test, results aren't posted.

Windows 10, IE11.0.10240.16384
Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729; InfoPath.3; rv:11.0) like Gecko

`GET` succeeds, subsequent `POST` fails.

Never really dealt with this issue before so don't know what kind of info would help...?
