为什么我从2100测试自动更新订阅的沙箱服务器获得21004作为状态值？

I'm testing aut-renewable subscription but apple's sandbox server always returns status=21004, which means 'The shared secret you provided does not match the shared secret on file for your account.'. I test with a java server, which does mostly this:I'm testing aut-renewable subscription but appl