AirDate Picker Visual Problem

I am using AirDate/Time Dropper plugin by sSeanhoots. Any idea why is it like this (it is the “Placeholder text” input) ? It is working properly in another popups. I can’t delete the popup and create a new one.

It is showing me this error also

Problem Solved. Just preview the app with no custom HTML and it will work normally after that. I don’t know why or how but that worked for me.

I lost a couple of hours solving it.
Thanks for the tip. It works.