Greetings,
I installed this extention via FTP: https://amasty.com/multiple-coupons.html
My version is Magento 1.9.4.1
It's not the first extention I install and I alredy know how to do it: nontheless I followed the installation guide carefully. It's all good, the extention is there and I can set it up as I want.
The problem is that doesn't work: if I try to apply any coupon, I get Error 500. I alredy contacted the company to get some help but they are a bit slow and this is quite urgent for me. For now I disabled the extention and everything works fine again.
