ERROR: Are you sure you wanted to do that?

I use MAMP to do WordPress development once in a while. This is the solution to the forum creation error.

add_filter( 'bbp_verify_nonce_request_url', 'my_bbp_verify_nonce_request_url', 999, 1 );
function my_bbp_verify_nonce_request_url( $requested_url ) {
  return 'http://localhost:8888' . $_SERVER['REQUEST_URI'];
}