Linkedin endpoint adAnalyticsV2

Question

I am having an issue in getting the data from LinkedIn API , I have got the permissions and trying postman to test endpoint to get data mention below is my get request , every time the response is an empty elements list with 200 ok. any help in this regard will be highly appreciated. I am sure that their is data its not that there is no activity but cant retrieve via api request.

https://api.linkedin.com/v2/adAnalyticsV2?q=analytics&dateRange.start.year=2019&dateRange.start.month=5&dateRange.start.day=28&dateRange.end.year=2021&dateRange.end.month=9&dateRange.end.day=30&timeGranularity=DAILY&pivot=MEMBER_COMPANY&projection=(*,elements*(externalWebsiteConversions,dateRange(*),impressions,landingPageClicks,likes,shares,costInLocalCurrency,pivot,pivotValue~(localizedName)))&fields=externalWebsiteConversions,dateRange,impressions,landingPageClicks,likes,shares,costInLocalCurrency,pivot,pivotValue&accounts[0]=urn:li:sponsoredAccount:123456789

and this is the response every time

{ "paging": { "count": 10, "start": 0, "links": [] }, "elements": [] }