Power Automate Custom Form Capture Form Input

I have simple power automate Custom Form and I am trying to capture Input data in form via message box and I am not getting correct value. Can someone please help me what am I doing wrong ?

Below are screenshots of CustomFormData and what I have entered into Message box to see what was entered. I see correct value entered into variable window but I am not able to populate same values in Message Window.

You have PowerFX enabled, so the standard %CustomFormData['URL']% notation will not work.

I believe you need to do something like CustomFormData.URL to get the same functionality.