require function not working in Promise

I'm trying to include modules in my nodejs application. The problem I'm facing is the code snippet below:

let adapter = new Adapter().then(function(result){
        let test= require('./loader');
        console.log(test);
}).catch(function(){});

Results always returned

{}

File loader.js

module.exports = {
   load_controller: () =>
   {
   }
};

Pls help me ^^

via diepnghitinh