Thank you Cory for your reply.
I read the 2 links but:
My website has HTTPS (not http) and I have the SSL code. I do not have also the MAMP Pro.
Still need help to fix this issue.
Thank you
I have the same problem. after I update to woocommerce 2.0.12. I tried to call “add-to-cart-variation.js”, but it did not work, because of select size for dropdownlist. please help.