Is there a way to fix the 10413 error that I am seeing when I enter a coupon?

Hello,

I am seeing the following error:

10413 - THE TOTALS OF THE CART ITEM AMOUNTS DO NOT MATCH ORDER AMOUNTS.

This is only happening when I enter a coupon.

You can find the course URL here:
http://bpsuniversity.com/courses/bps-level-1-workshop/