WWW Post (Form) not working on mobile.

I've copied this very simple example. https://docs.unity3d.com/ScriptReference/WWWForm.html

Now, when testing on my iPhone 6 & Nexus 5 both of them fail to make a request.

On Android I get:

Request error: java.net.ConnectException: failed to connect to /192.168.0.50 (port 50122): connect failed: EHOSTUNREACH (No route to host)

On the iPhone I get nothing but no connection.

This works for desktops (Mac). This works for Android but only once (after turning WiFi on and off again. Not viable)

Here is my sample code:

// From some request StartCoroutine(ProcessRequest

public IEnumerator ProcessRequest() { WWWForm form = new WWWForm(); form.AddField("data", jsonData);

 WWW request = new WWW(url, form);
 yield return request;

 // Do some stuff.

}