Profile: manavdeep

There is error displaying in schedule task when i click on run Now it Reward Points Worked.

using nopcommerce 3.7

steps  i follow in foxnet
1 Referral Email send to  friend.
2 Foxnet plugin list shows status sent .
3. Friend get email and click on link and open page with popup of welcome referral program.
4. Friend buy that product choosing cash on delivery.
5. open admin panel and click on orders and view order that is displaying pending in status.
6. click on shipments and add shipment and change status into shipped and delivered.
7. change order status to completed and payement status to paid.
8. in refferal list it shows status paid but 0 points.
settings in plugin
Enable plugin: clicked
product of referral : 500

i have install  trail version of Product Referral Rewards but it is always displaying 0 points to the person who referr the product.