a 'AddPublisher' state was sent from poe at 13 to session 2, but session 2 has neither that state nor a _default state to handle it

POE::Component::Server::TCP->new( Alias => 'TCPServer',
                                  ...
                                  InlineStates => {
                                      AddPublisher => sub {} } ;

$_[KERNEL]->post( TCPServer =>
                  AddPublisher =>
                  $_[SESSION],
                  1 ); },