Getting empty response with any(saveObject or saveobjects or partialUpdateObjects) api

i had integrated with Laravel framework.
data are send to Algolia cloud successfully but unable to get any response.
i have write the response object to laravel log and seen it is empty object.

Log data for response saveobjects API as bellow

[2023-12-20T15:55:22.963917+1100] local.INFO: $response from algolia cloud after saveObjects API calling:: [{"Algolia\\AlgoliaSearch\\Response\\BatchIndexingResponse":[]}] 

Log data for response partialUpdateObjects API as bellow

[2023-12-20T15:51:38.113301+1100] local.INFO: $response from algolia cloud after partialUpdateObjects API calling:: [{"Algolia\\AlgoliaSearch\\Response\\BatchIndexingResponse":[]}]

Can any one help me on this?