When we click on the commerce category it will show the above error insted of showing commerce catogory items, we can solve this error using below method.
Scenario:

Solution:
- Step 1: In Netsuite go to Commerce –> Website –> Website Lists

- Step 2: Select the website and click on edit.
- Step 3: In Search Index subtab select Sort Fields and add commerce category to that list a

Result:
