I updated this code into the 'custom.css' file on your site:
/*Fix scroll issue*/
@media screen and (max-width: 750px){
#myGallery {
display: flex !important;
}
#s5_iacf_content_wrap {
overflow-x: hidden;
width: 100%;
}
#s5_center_area1 #s5_center_column_wrap{
left: 0 !important;
max-width: 100%;
overflow: hidden;
}
#s5_center_area1 #s5_center_column_wrap #s5_center_column_wrap_inner{
left: 0 !important;
padding: 0;
}
}
It's working now, kindly check.