Check if there is a focused field before trying to scroll to it

Author: alvaromb

lib/KeyboardAwareMixin.js

@@ -36,6 +36,9 @@ const KeyboardAwareMixin = {
     })
     // Automatically scroll to focused TextInput
     const currentlyFocusedField = TextInput.State.currentlyFocusedField()
+    if (!currentlyFocusedField) {
+      return
+    }
     UIManager.viewIsAncestorOf(
       currentlyFocusedField,
       this.getScrollHandle().getScrollResponder().getInnerViewNode(),