就我而言，SHA1 指纹不正确.

In my case, the SHA1 finger print was incorrect.

1. 转到 Google Play Developer Console，找到您的游戏
2. 转到左侧的游戏详细信息"标签
3. 向下滚动到API 控制台项目"并点击您的项目名称"
4. 现在在 Google Developer Console(不同的控制台)中，转到 API 管理器
5. 点击凭据标签
6. 在 OAuth 2.0 客户端 ID 下，点击您的项目名称
7. 现在，您终于可以更改您的 SHA1 指纹和/或包名称了.

1. Go to the Google Play Developer Console, and find your game
2. Go the the "Game Details" tab on the left
3. Scroll Down to "API Console Project" and click your "Project Name"
4. Now in the Google Developer Console (Different Console), go to API Manager
5. Click the Credentials Tab
6. Under the OAuth 2.0 Client IDs, click your project name
7. And now, finally, you can change your SHA1 finger print and/or package name is need be.