AWS Lambda Function is returning "Cannot find module 'index'" yet the handler in the config is set to index

As my title explains I am getting the following error:

 {
  "errorMessage": "Cannot find module 'index'",
  "errorType": "Error",
  "stackTrace": [
    "Function.Module._resolveFilename (module.js:338:15)",
    "Function.Module._load (module.js:280:25)",
    "Module.require (module.js:364:17)",
    "require (module.js:380:17)"
  ]
}

I have tried both solutions provided in creating-a-lambda-function-in-aws-from-zip-file and simple-node-js-example-in-aws-lambda

My config currently looks like:

and my file structure is:

and my index.js handler function looks like :

exports.handler = function(event, context) {

What else could be causing this issue aside from what was stated in those two answers above? I have tried both solutions and I have also allocated more memory to the function just incase thats why it couldn't run.