EACCES is typically returned when you don't have rights to bind a socket to a specific ip addr / port. Perhaps you need to run as admin?
But it's not clear if that message (from the post title) relates to the body of your message.
The command prompt should likely "not complete", as it's a server and will run forever. That seems like the expected message for hitting Ctrl-C (ie, "Terminate batch job ...")
Typically folks have problems connecting, somehow, from their device to the server.
You might try accessing the default web page from your device - http://my-weinre-server-address:port-number/ and try the demo, to see if that works. If it doesn't, then it's not going to work for your app either, and there is some kind of issue with the networking. Also try running weinre with --verbose and --debug, to see if anything interesting gets printed.