In App Chat Silk UI: create new handler for OnFirebaseMissingData

I cannot find OnFirebaseMissing Data. All I see is this in the interface:

I have followed all other steps listed up till Creating a New Mobile Chat: Step 6:

 https://success.outsystems.com/Documentation/SILK_UI_Framework/In-App_Chat_Mobile_Component

Solution

I found it. I needed to click on the chat widget and then it was viewable.

Solution