@juanshishido Thank you for your reply.
We have tested two calls.
First call:
$ twurl -H ads-api-sandbox.twitter.com "/2/accounts"
Response:
{"request":{"params":{}},"next_cursor":null,"data":[]}
Second call:
$ twurl -X POST -H ads-api-sandbox.twitter.com "/2/accounts"
Response:
{"errors":[{"code":"INTERNAL_ERROR","message":"Internal Error"}],"request":{"params":{}}}
FYI our new Twitter account is ineligible to use the Twitter Ads program, therefore we cannot test Ads API calls outside sandbox.
Hope you can find a solution for us.
Thank you.