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Yes, we were working on your app, but seems there is another error occured then that one you described. Anyway we'll continue researching. I'll let you know when have more information.
Add JS for request parameters for Twitter page as you have on MainMenu, and add event Load with action "Invoke service" for service from Twitter page.
So you didn't add access token for this service, and twitter doesn't give you access (see 400 error in console).