title: VPC_CLIENT_ERROR: Unexpected EC2 error: InvalidGroup.NotFound
body: <p>I encountered this error today on our AWS pipeline, in the CodeBuild Step:</p>
  
  <pre><code>VPC_CLIENT_ERROR: Unexpected EC2 error: InvalidGroup.NotFound
  </code></pre>
  
  <p>The only mention of this exact error I could find was here (but it's in Japanese I think) - <a href="https://qiita.com/matsuda-hiroki/items/39188d52a002b5461d6f" rel="nofollow noreferrer">https://qiita.com/matsuda-hiroki/items/39188d52a002b5461d6f</a>.</p>
  
  <p>I found a similar, but not the same, error here - <a href="https://stackoverflow.com/questions/58321632/aws-codebuild-vpc-client-error-unexpected-ec2-error-unauthorizedoperation">AWS CodeBuild VPC_CLIENT_ERROR: Unexpected EC2 error: UnauthorizedOperation</a></p>
  
  <p>Does anyone know what this means?</p>