HTML and CSS for the “Spin Wheel Popup” not supported on the mobile device.

I tried the same as you suggested.
is_page(104) but it still not working.

Conditional tags:

is_home() || is_front_page() || is_single() || is_page() || is_category() || is_cart() || is_checkout() || is_product_category() || is_shop() || is_product() || is_page(104)

Could you please check the “Spin Wheel popup” on the mobile device for the following site: https://replica.geekgearbox.com/?
I got a small wheel icon on the main wheel image.
Image link:
https://lh3.googleusercontent.com/-5Q1oZxpQTbQ/XpgCu-8dVRI/AAAAAAAAA_o/vyijgH6jkQ0H2bsnWzsVAgY06ta1kjROACK8BGAsYHg/s0/2020-04-16.png

Could you please tell me how to resolve this error?

To be honest, i’ve nerver seen this issue before and i have no idea how to debug it. And the cache issue is not resolved yet, i see it still happen.
Regarding conditional tag, please try using only is_page(104) and clear your cache.

Could you please provide the list of different user agents groups so that I can create different groups for mobile devices and for desktop?

I don’t know. It’s available within the cache plugin, please contact them to ask how to make it works properly.

Ok, thanks for the support.