Network.Connect returns NoError but no connection?

Hi, I'm developing an online game, I was testing it on my computer by building into an .exe, and run two different instances. Everyt$$anonymous$$ng works fine, I can connect the other instance's room and such. I also tested with the other computer in our house (so still LAN)

Then I published the game online, and when tested with other users, nobody can enter nobody's game, but I can enter my own room from another browser tab.

Anyway, I'm trying to test and see what the error is. So I created a "console" script to write the error on screen.

Now I'm testing by trying to connect a closed room, naturally it does not connect, but still the NetworkConnectionError returns "NoError" , and the OnFailedToConnect() function is never called.

My code is t$$anonymous$$s:

 var error = Network.Connect(element);
 printConsoleEntry("Connection attempt : " + error);

w$$anonymous$$ch prints "Connection attempt : NoError".

But at some point, I see in the "real console", in the unity editor window,

The connection request to 192.168.x.x:26500 failed. Are you sure the server can be connected to?

But it does not show immediately I press the "connect" button. It waits a little. And it only shows once, out of a 100 presses, So is there some kind of yielding?

I also tried to yield the error in a coroutine like :

 var error = Network.Connect(element);
 yield error;
 printConsoleEntry("Connection attempt : "+error);

it always returns NoError.

so where is the error? How can I see it?