When you search for category in the Datasheet, the following error message appears
Error: No eBay Category was Found for this site.

Reason:
The search option is incorrectly selected. There are two ways to search for categories: "By eBay suggestion" and "By category name". An error will be reported if the option is incorrectly selected during search.

Solution:
If you are searching by title or keyword, please switch search options according to the following picture：