How to get some specific Assignment EFF for all workers ?

Summary:

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Hi all

We created a specific Assignment EFF (category Code = PER_ASG_EIT)
Is there a way to expand the specific Assignment EFF which name is Information5FFR_5FPROF_5FCATEGORIESprivateVO for all workers ?

We try this but it does not work:
GET {{base_url}}/hcmRestApi/resources/11.13.18.05/workers?totalResults=true&q=workRelationships.assignments.assignmentsEFF.CategoryCode='PER_ASG_EIT'&expand=workRelationships.assignments.assignmentsEFF.Information5FFR_5FPROF_5FCATEGORIESprivateVO

Thanks
Touny

Version (include the version you are using, if applicable):

11.13.18.05

Code Snippet (add any code snippets that support your topic, if applicable):