Because some people are telling you to delete your client to remove the error when closing it, you can use this to create your client instead (supports ip + port) :
You can't fix basic things, but am I stupid? Oh ok poor world
because you knew how to do it? Stop a little. You waited for fizo's response to find out. You ******* who thinks he's a developer. I'm sure you don't even know how to install an IDE