After update AdSense API version 2, no data from reports

Question

I tried like below

https://adsense.googleapis.com/v2/accounts/pub-xxxxxxxxxxxxxxx/reports:generate?dateRange=CUSTOM&startDate.year=2021&startDate.month=10&startDate.day=12&endDate.year=2021&endDate.month=10&endDate.day=12&currencyCode=USD&metrics=AD_REQUESTS&dimensions=AD_CLIENT_ID&alt=json

I didn't get any error code, http status was 200. But I can't see any rows data. Only thing I can see is header information.

I checked all release note about v2 because something might be depreciated. But metrics(AD_REQUESTS) requested is okay and dimensions(AD_CLIENT_ID) requested is also okay.

What did I miss?