We've debugged the issue. The error occurred because we only selected the Release configuration instead of Debug when adding DeclaredAgeRange in the capabilities. It works fine now after using a sandbox account. Thanks, and sorry for the bother.

@andy-1990

大神，我这一直报错AgeRangeService.Error.notAvailable，真是让人崩溃。请教一下怎么调通的。我使用了普通账号小于18岁、共享账户的儿童账号、沙盒账号的年龄验证都是报错。地区调整到美国，上科技都不行。 或者能加你个联系方式吗