JavaScript error in FacebookConnect.requireSessionNative() running on localhost:8888 with GWT 2.0.0

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Steps to reproduce:
1. Configure FB app with Connect URL: http://localhost:8888/
2. Copy API key from the FB app to SampleApp.java
3. Deploy the application in development mode and run it on localhost:8888
4. Click on "Login with facebook connect"

Expected output:
A Facebook Connect request in a pop-up

What do you see instead?
An exception in development shell because of JavaScript error in 
FacebookConnect.requireSessionNative()

Version:
gwt-facebook-1.0-BETA9.jar, gwt-2.0.0

Stack trace:
Uncaught exception escaped
com.google.gwt.core.client.JavaScriptException: (null): null
    at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:195)
    at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:120)
    at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:507)
    at com.google.gwt.dev.shell.ModuleSpace.invokeNativeVoid(ModuleSpace.java:284)
    at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeVoid(JavaScriptHost.java:107)
    at com.gwittit.client.facebook.FacebookConnect.requireSessionNative(FacebookConnect.java)
    at com.dragonsblaze.firemoth.client.SampleApp$LoginClickHandler.onClick(SampleApp.java:53)
    at com.google.gwt.event.dom.client.ClickEvent.dispatch(ClickEvent.java:54)
    at com.google.gwt.event.dom.client.ClickEvent.dispatch(ClickEvent.java:1)
    at com.google.gwt.event.shared.HandlerManager$HandlerRegistry.fireEvent(HandlerManager.java:65)
    at com.google.gwt.event.shared.HandlerManager$HandlerRegistry.access$1(HandlerManager.java:53)
    at com.google.gwt.event.shared.HandlerManager.fireEvent(HandlerManager.java:178)
    at com.google.gwt.user.client.ui.Widget.fireEvent(Widget.java:52)
    at com.google.gwt.event.dom.client.DomEvent.fireNativeEvent(DomEvent.java:116)
    at com.google.gwt.user.client.ui.Widget.onBrowserEvent(Widget.java:100)
    at com.google.gwt.user.client.DOM.dispatchEventImpl(DOM.java:1307)
    at com.google.gwt.user.client.DOM.dispatchEvent(DOM.java:1263)
    at sun.reflect.GeneratedMethodAccessor28.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
    at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
    at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:157)
    at com.google.gwt.dev.shell.BrowserChannel.reactToMessagesWhileWaitingForReturn(BrowserChannel.java:1713)
    at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:165)
    at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:120)
    at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:507)
    at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:264)
    at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91)
    at com.google.gwt.core.client.impl.Impl.apply(Impl.java)
    at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:188)
    at sun.reflect.GeneratedMethodAccessor25.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
    at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
    at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:157)
    at com.google.gwt.dev.shell.BrowserChannel.reactToMessages(BrowserChannel.java:1668)
    at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:401)
    at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:222)
    at java.lang.Thread.run(Thread.java:619)

Original issue reported on code.google.com by aadityab...@gmail.com on 26 Jan 2010 at 8:23

[GoogleCodeExporter]

It's an awesome project, I must say. I'd love to contribute to it at some 
point. 
Thanks, olamar72!

Original comment by aadityab...@gmail.com on 26 Jan 2010 at 8:28

[GoogleCodeExporter]

Thanks !

Hm, will upgrade my project to gwt 2.0 and test it myself! 
Are you using your own api key? The sample api key in the code will only work
for 8080.

You can also try to crosspost this issue to the forum: 
http://groups.google.com/group/gwt-facebook

Original comment by olama...@gmail.com on 27 Jan 2010 at 2:21

[GoogleCodeExporter]

updated the code. please test it to see if you still get an error!

Original comment by olama...@gmail.com on 7 Feb 2010 at 4:27