Mobile device compatibility

I have a schemme set up and operating fine on a desktop platform but on mobile platforms, both Android and iPhone, seat selection is not possible. It displays the error message ” Sorry, you can not add this place to your selection!” (I have changed the wording in class-book-a-place.php) I am using Wiziapp to generate my mobile theme. I have tried other mobile theme generating apps with the same result.

It is important to have a mobile friendly apps these days. Do you recommend a mobile theme that book-a-place is compatible with.

https://www.ads-software.com/plugins/book-a-place/