Hi,
Try to add this custom CSS code:
.single-product .woocommerce-notices-wrapper, .single-product .woocommerce-NoticeGroup, .single-product .woocommerce-message, .single-product .woocommerce-error, .single-product .woocommerce-info {
bottom: auto;
z-index: 999;
top: 0;
}
Regards,
Hung PD