https://userapps.support.sap.com/sap/support/knowledge/en/2580438
2580438 - ADTSET_GET_ENTITYSET not implemented | SAP Knowledge Base Article
When using the Fiori App. "Custom Analytical Queries", if the user tries to create or edit a custom analytical query, the following error is displayed on the...
sap knowledgegetimplementedbasearticle
https://developers-dot-devsite-v2-prod.appspot.com/assistant/actionssdk/reference/rest/Shared.Types/EntitySet
EntitySet | Conversational Actions | Google for Developers
conversationalactionsgoogledevelopers