im trying to use in app billing on my app so trying to test it then when i click the button its shows cannot be cash by the blocks i use to add the product details such as text string and others, You can check the image below to understand what i mean.
i tried using the tutorial on the video, but when i click the button, it shows nothing, i even publish the app and set the in app subscription, still when the button get clicked, it shows nothing.