Unable to choose file

Hey I am sort of having the same problem

const options = {
  // Required. Called when a user selects an item in the Chooser.
  //@ts-ignore
  success: function(files) {
      // alert("Here's the file link: " + files[0].link)
      console.log(files);
  },

  cancel: function() {
    console.log('hellp')
  },
  linkType: "preview", // or "preview"
  multiselect: true, // or true
  extensions: ['.pdf', '.doc', '.docx', '.txt'],
  folderselect: false, // or true
  sizeLimit: 1024, // or any positive number
};

 Here  are the options that i have used. please let me know about the next steps