Step 9. Show final output - Button not showing

It appears as if the value that is used for the condition which sets the "SEE FILE" button visibility is null.

I've run the final code provided and the result is that this button cannot be seen. Its visibility is never set to visible because the condition is never met.


Start with the Step 9 final code and reproduce the missing "SEE FILE" button. Trace the value used by the button-visibility condition and determine why it remains null. Done means the condition receives the expected value and the button is visible when the final output is available.

Written by the indexing model from the issue text.