Hi,
To fix this problem:
Open this PHP file:
/templates/flexilbe_sportmart/html/com_virtuemart/productdetails/default_addtocart.php
1- after this line:
defined ('_JEXEC') or die('Restricted access');
include these lines:
if (isset($this->product->step_order_level))
$step=$this->product->step_order_level;
else
$step=1;
if($step==0)
$step=1;
$alert=JText::sprintf ('COM_VIRTUEMART_WRONG_AMOUNT_ADDED', $step);
2- after this line:
<form method="post" class="product js-recalculate" target="_parent" action="<?php echo JRoute::_ ('index.php'); ?>">
include this line:
<input name="quantity" type="hidden" value="<?php echo $step ?>" />
then you should be good to go.
Regards.