Been running my website for around a year now and have been an eCommerce store running woo-commerce. My coupons have always worked normally… I would create them and then customers would be able to enter a code during checkout. Downloaded Affiliates Pro and everything has worked great so far except for when I add a coupon to my test affiliate under attributes.
For example; I have a coupon code titled “fav20” for 20% off. It has been used before by other customers with an expiration at the end of this year (2019). It applies to all products on my site and never has been an issue for my site before. Unfortunately, once I link it to the test affiliate it no longer is read as valid through my website. Once I remove it from the test affiliate it is valid once again. My theme is flatsome for wordpress.