How to save Twillio settings

Sorry, if this has been asked before (I did search for Twillio, only 4 results came up), but I tried refreshing, tried going to Notification tab, and sometimes it would save setting the next minute they are gone. And there is no intuitive “save” button.
I just got my Veralite and I want to use TTS feature for my garage sensor.
See screenshot: http://awesomescreenshot.com/0813ko7s78