Not able to use grunt run to run protractor tests with protractor-flake about protractor-flake HOT 6 CLOSED

Running "run:protractor-flake" (run) task
Verifying property run.protractor-flake exists in config...OK
File: [no files]
Options: wait, failOnError=false, quite=false, ready=1000, cwd="/Users/walmyr/www/video-conference", passArgs=[], itterable=false, readyBufferLength=1024
running ./node_modules/.bin/protractor-flake with args [ '--protractor-path=./node_modules/.bin/protractor',
  '--max-attempts=2',
  '-- test/protractor-e2e/protractor.conf.js' ]
**you must either specify a configuration file or at least 3 options. See below for the options:

Usage: protractor [configFile] [options]
configFile defaults to protractor.conf.js
The [options] object will override values from the config file.
See the reference config for a full list of options.

Options:
  --help                                 Print Protractor help menu
  --version                              Print Protractor version
...

        protractorFlake = grunt.option('rerun-flake') || '';

        if (protractorFlake) {
            cmd.push(protractorFlakeBinPath);
            cmd.push(protractorBinPath);
            cmd.push('--parser=cucumberMulti');
            cmd.push('--max-attempts=' + attempts);
            cmd.push('--');
        } else {
            cmd.push(protractorBinPath);
        }