Problem when installed commerce-add-to-cart-confirmation module

Hi

I got this error when i installed commerce-add-to-cart-confirmation module


Notice: Undefined index: commerce-add-to-cart-confirmation in drupalexp_status_messages() (line 18 ofC:\xampp\htdocs\recheyfit\profiles\drupalexp_pressa_commerce\themes\drupalexp\includes\form.inc).

i already opened a ticket for this problem #3194 on 19/12/2015