Keep getting TypeError: config.suite.split is not a function when running regression tests

I got the following error when running a sample regression test:

TypeError: config.suite.split is not a function

Here is the the configuration file. It looks ok but I must have missed something but I can't honestly find what it could be.

Configuration.js file (this was working few days ago)

var Jasmine2HtmlReporter = require('protractor-jasmine2-html-reporter');

exports.config = {
  seleniumAddress: 'http://localhost:4444/wd/hub',
  specs: ['PageObjectLocator2.js'],
  capabilities: {
    browserName: 'chrome'
  },

  onPrepare: function() {
      browser.driver.manage().window().maximize(); 

      jasmine.getEnv().addReporter(
                new Jasmine2HtmlReporter({
                  savePath: 'target/screenshots'
                })
              );




  },// end of onPrepare

  suite:
      {
      Smoke  : ['ChainLocator.js','dropDowns.js'],
      Regression : 'nonAnuglarSpec.js'

      },



//Options to be passed to Jasmine-node.
  jasmineNodeOpts: {
    showColors: true, // Use colors in the command line report.
  }

}

This is the package.json file. Could the issues here but honestly don't know

{
  "name": "LocatorTraining",

  "dependencies": {

"protractor":  "^5.4.1",
"jasmine-data-provider": "^2.2.0",
"protractor-jasmine2-html-reporter":"^0.0.7"



  },


  "scripts": {

 "webdriver-update": "./node_modules/.bin/webdriver-manager update",
"webdriver-start": "./node_modules/.bin/webdriver-manager start",
"protractor": "./node_modules/.bin/protractor configurations.js",
"SmokeTest": "./node_modules/.bin/protractor configurations.js  --suite Smoke",
"RegressionTest": "./node_modules/.bin/protractor configurations.js  --suite Regression",

 "start": "npm run webdriver-update && npm run webdriver-start"

  }

}

Message from termaminal.

Jacquelines-MacBook-Air:LocatorTraining jacquelinegeorge$ npm run RegressionTest

> LocatorTraining@ RegressionTest /Users/jacquelinegeorge/Documents/JSworkspace/LocatorTraining
> protractor configurations.js  --suite Regression

/Users/jacquelinegeorge/Documents/JSworkspace/LocatorTraining/node_modules/q/q.js:155
                throw e;
                ^

TypeError: config.suite.split is not a function
    at Function.getSpecs (/Users/jacquelinegeorge/Documents/JSworkspace/LocatorTraining/node_modules/protractor/built/configParser.js:86:26)
    at new TaskScheduler (/Users/jacquelinegeorge/Documents/JSworkspace/LocatorTraining/node_modules/protractor/built/taskScheduler.js:34:100)
    at helper.runFilenameOrFn_.then.then.then (/Users/jacquelinegeorge/Documents/JSworkspace/LocatorTraining/node_modules/protractor/built/launcher.js:175:25)
    at _fulfilled (/Users/jacquelinegeorge/Documents/JSworkspace/LocatorTraining/node_modules/q/q.js:834:54)
    at /Users/jacquelinegeorge/Documents/JSworkspace/LocatorTraining/node_modules/q/q.js:863:30
    at Promise.promise.promiseDispatch (/Users/jacquelinegeorge/Documents/JSworkspace/LocatorTraining/node_modules/q/q.js:796:13)
    at /Users/jacquelinegeorge/Documents/JSworkspace/LocatorTraining/node_modules/q/q.js:604:44
    at runSingle (/Users/jacquelinegeorge/Documents/JSworkspace/LocatorTraining/node_modules/q/q.js:137:13)
    at flush (/Users/jacquelinegeorge/Documents/JSworkspace/LocatorTraining/node_modules/q/q.js:125:13)
    at internalTickCallback (internal/process/next_tick.js:70:11)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! LocatorTraining@ RegressionTest: `protractor configurations.js  --suite Regression`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the LocatorTraining@ RegressionTest script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/jacquelinegeorge/.npm/_logs/2018-11-07T14_32_24_804Z-debug.log