Steps to reproduce

1. Install Ibexa DXP v4.5
2. Create a product category with an identifier test
3. Goto domain/graphiql
4. execute below code:

{
   category: productCategoriesTaxonomy{
      single(identifier: "test"){
        name
        id
        identifier
      }
    }
} 

Result

An error occurred as below

"debugMessage": "Taxonomy Entry with Identifier: 'test' not found in 'tags' taxonomy.", 

Expected result

Showing the correct product category

Note

For id and contentId, getting the product category works fine