Why can't I post in business?

[Matt141980]

Trying to make a new topic in the Business section but keep getting this message when I press submit.

Sorry!
An Error occurred. Please click a link in the navigation at the top of the page to continue.
There has been a problem with content delivery. 417 Expectation Failed


Using an ipad if it makes any difference?

[slinky]

Are you using mobile.pistonheads.com on your ipad?

[TonyRPH]

There's a thread running on the 417 error here