UGC avatars not returned from endpoint anymore.

curl --request GET
--url https://api.heygen.com/v2/avatar_group/ef1560c0741d45eabe17db5422fd9782/avatars
--header 'accept: application/json'
--header 'x-api-key: <api_key>'

{"data":null,"error":{"code":"internal_error","message":"Avatar group not found: ef1560c0741d45eabe17db5422fd9782"}}

None of the UGC / Public avatars are returned via this endpoint anymore.