The problem is: "
REMOVE button doesn't work within the off-canvas shopping cart"
We have made a silly mistake in one of the core files.. To fix this problem, open this PHP file:
/modules/mod_flexible_cart/mod_flexible_cart.php
2- find this line (line # 97):
url: '/vm3/sportmart/index.php?option=com_virtuemart&view=cart&task=delete',
3- replace it with this:
url: '<?php echo JURI::root( true ); ?>/index.php?option=com_virtuemart&view=cart&task=delete',
4- find this line (line # 103)
var loadAgain = jQuery.getJSON('/vm3/sportmart/index.php?option=com_virtuemart&nosef=1&view=cart&task=viewJS&format=json',
5- replace it with this:
var loadAgain = jQuery.getJSON('<?php echo JURI::root( true ); ?>/index.php?option=com_virtuemart&nosef=1&view=cart&task=viewJS&format=json',
That's all, you are all good to go.
Regards