title: Google OAuth Authentication suddenly fails and issues "disabled_client"
body: <p>We run a web application with a Java Script- and an Android front end. We use Google IDs with OAuth for authentication. Everything worked find until today authenticaiton suddenly stopped working. There was no new software version deployed or any operational changes. Now, when a user tries to log on via the browser application, Google issues</p>
  
  <pre><code>401. That’s an error.
  Error: disabled_client
  The OAuth client was disabled.
  Request Details
    scope=openid profile email
    response_type=code
    redirect_uri=https://***.net/signin-google
    state=***
    client_id=******.apps.googleusercontent.com
  That’s all we know.
  </code></pre>
  
  <p>When logging in via Android App, authentication fails too, GoogleAuthUtil.getToken raises an unspecific exception.</p>
  
  <p>I couldn't find much information when googling for this error message. Some say, one should try to change the application name in the consent screen. This didn't help in my case.</p>
  
  <p>In developer console I noticed, that I cannot create a new Client ID for this project. I always get a technical error ("Server Error Whoops! Our Bad.") with a tracking number. Seems to be related.</p>
  
  <p>I have a total of 7 Client IDs registered for this project and 3 public API access keys.</p>
  
  <p>Is it possible, that Google explicitly disabled our project? That's how it actually feels. For what reason? I didn't get any notification. Our product is an application for access control, nothing special or illegal here.</p>
  
  <p>Any ideas? This is a production environment, so for us the problem is absolutely severe.</p>
  
  <p>Thanks for any help!</p>