My multiplayer connetivity isnt working for the tic tac toe app

App Development
1

NSNetServiceBrowser did not search with error dict [{
NSNetServicesErrorCode = “-72008”;
NSNetServicesErrorDomain = 10;
}].
Server did not publish: errorDict [{
NSNetServicesErrorCode = “-72008”;
NSNetServicesErrorDomain = 10;
}].
this is the error i get but i did exactly what chris said in the video. any help?