Hello,

Sorry for the delay.

The pagination is not possible to change on mobile.

The errors can be removed with custom CSS:

body .arrows-style-1 .flickity-button.previous {
    justify-content: flex-start;
}
body .arrows-style-1 .flickity-button.next {
    justify-content: flex-start;
}

You need to add the code to the Theme Settings > Custom CSS > Tablet/Mobile.

Best Regards