google drive api - Why is this sample AppScript returning error: "Access Denied: DriveApp?"

Question

I received this error when attempting to run the sample Drive AppScript, even after authorizing the AppScript to access Drive. I have also tried hard-coding a folder ID and am receiving the same error.

The code is as follows:

function listFilesInFolder(id) {
  var folder = DriveApp.getFolderById(id);
  var contents = folder.getFiles();
  var file;
  var name;

  while(contents.hasNext()) {
    file = contents.next();
    name = file.getName();
    Logger.log(name);
  }
};

Answer 1

In the Admin Console for you or your domain (admin.google.com) . section Drive - General settings - Enable "Allow users to install Google Drive Apps"