invalid argument if using multiple coupons

hi i did find post about this but not the solution which would be important to share. i have this problem. if using multiple coupons i when confirmate order i get this error
Fatal error: Call to a member function createPriceDiv() on a non-object in /home/mhd-01/www.****.it/htdocs/templates/mytemplate/html/com_virtuemart/cart/default_pricelist.php on line 162

please how can i solve this?
thank you

using joomla 2.5.8
awo coupon pro 2.1.3
virtuemart 2.0.14

and i have tested it does not work even with one single coupon code... :(

Hello,

Did you try this solution:
https://awodev.com/forum/awocoupon/help-section/awo-pro-2-virtuemart-2-not-recognizing-coupon-does-discount#comment-3978

thank you, i disabled in config the shop coupon and then applyed your hack and it solved out. without disabling the shop coupons it did not work.
please add it in next release !
thanks a lot