My Humble Bundle coupons don't work

There are known issues with the site and humble bundle coupons, and we are working to fix them as soon as possible.

Firstly, always make sure you redeem coupons for Humble Bundles 1 at a time.

1. Coupons must be redeemed 1 at a time. If you attempt to redeem multiple coupons at once, only the latest applied coupon will work, which could cause you to accidentally purchase more than 1 bundle.

Secondly, there are a few known issues with Humble Bundle redemption:

1. The website doesn't currently show whether a coupon has been redeemed or not. So you might be looking at a page that appears to have a valid coupon applied, but in fact it is not a valid coupon. This is confusing and will be fixed.
2. The website doesn't let you know if the coupon you have applied works for the specific product you are viewing or not. This is confusing, because you might be looking at a Godot course, and have a coupon for a Humble Bundle, but it looks like the coupon applies to the Godot course. It does not on the backend, it is just a front end visual glitch.