Handle invalid spec location

signin.js

@@ -61,7 +61,6 @@ class Signin extends EventEmitter
 
 	Start( action, params, handler )
 	{
-		var request = new HttpRequest( this.conf.spec );
 		var _self = this;
 
 		if( this.spec )
@@ -70,6 +69,14 @@ class Signin extends EventEmitter
 		}
 		else
 		{
+			if( !this.conf.spec )
+			{
+				var eArgs = new SignInEventArgs({ "success": false, "data": [] });
+				handler( this, eArgs );
+				return;
+			}
+
+			var request = new HttpRequest( this.conf.spec );
 			request.addListener( "RequestComplete", function( sender, e )
 			{
 				if( e.statusCode == 200 )