I'm uploading my file using multer, and then I'm trying to read the JSON file and do some operations for it. Apparently, when I take the name of the file and pass it to my function I'm getting the error following error:

The code inside my app.js

//UPLOAD FILE READER
const storage = multer.diskStorage({
  destination: (req, file, cb) => {
    cb(null, 'points')
  },
  filename: (req, file, cb) => {
    const { originalname } = file;
    cb(null, originalname)
  }
})

const upload  = multer ({ storage })

//Function to get the name of the file for future use
var splitTest = function (str) {
  return str.split('\\').pop().split('/').pop();
}


app.post("/uploadFile",upload.single('fileupload'),(req, res, next) => {
    // Read File Before Uploading
    const absolutePath = path.join(__dirname, req.file.path);
    const jsonString = fs.readFileSync(absolutePath, "utf-8");
    const jsonObject = JSON.parse(jsonString);
    nameFile = splitTest(absolutePath)

    //JSON SCHEMA VALIDATOR
    var innerSchema = schemas.jsonSchema;
    var innerArraySchema = {
      "type": "array",
      "items" : innerSchema
      }
    const ajv = new Ajv()
    const valid = ajv.validate(innerArraySchema, jsonObject)
    if (!valid) {
      fs.unlinkSync(req.file.path)
      res.redirect('admin')
    }
    else {
    console.log(nameFile)
    rFile(nameFile)
    res.redirect('admin')
    }
})

Also the function I call inside my app.js.

//Load JSON DATA to MySQL
rFile("starting_pois.json") --> For testing its working perfectly
function rFile(fileName) {
  fs.readFile(`../points/${fileName}`, 'utf-8', (err, jsonString) => {
  // Do stuff....