Using Firefox on Dynamicweb 9.2.8, I can set up a new reward, but I can't define rules. Here are the steps to repro the issue:
1. Open Ecommerce | Loyalty points
2. Click New and enter the details for the reward
3. In the Rules grid, click "Click here to add a new row". When you click it, nothing happens so you can't add new rules.
I also tried Save and Save and Close first before adding a new rule, and tried other browsers like Chrome but that doesn't make a difference.
Thanks,
Imar