I'm trying to submit a local classified ad for the snow tires I had on my 2013 BMW 335i (E93), but the process seems to freeze. After a few minutes, I get a message as follows:

Request Timeout

Server timeout waiting for the HTTP request from the client.
Additionally, a 408 Request Timeout error was encountered while trying to use an ErrorDocument to handle the request.

I tried clearing my browser cache, but it didn't make any difference.

Any advice? Thanks much.