Saving Files

Photoshop UXP Plugin API
1

I have tried the code from Save File with user defined Native path but it never saves the file.

Here is the full code I have.

API-2 and Manifest 5
I have 2 buttons, one asks the user to set a location and the other button saves the file.

//Button to open Dialog asking where to save to
document.getElementById('chooseLocation').addEventListener('click', async () => {

  await exeModal(doStuff, {
    "commandName": "Please Wait"
  });

  async function doStuff(executionContext) {

    let hostControl = executionContext.hostControl;

    // Get an ID for a target document
    let documentID = await app.activeDocument._id;

    // Suspend history state on the target document
    let suspensionID = await hostControl.suspendHistory({
      "historyStateInfo": {
        "name": "Your History State Name",
        "target": [{
          _ref: "document",
          _id: documentID
        }]
      }
    });

    /*
    Do stuff here. 
    It can be batchPlay or any other javascript code
    */
    var myFolder = await require("uxp").storage.localFileSystem.getFolder();

    let token = await require("uxp").storage.localFileSystem.createPersistentToken(myFolder);

    localStorage.setItem("persistent-token", token);

    await hostControl.resumeHistory(suspensionID);
  }

});

// Button to save the file
document.getElementById('saveFile').addEventListener('click', async () => {

  await exeModal(doStuff, {
    "commandName": "Please Wait"
  });

  async function doStuff(executionContext) {

    let hostControl = executionContext.hostControl;

    // Get an ID for a target document
    let documentID = await app.activeDocument._id;

    // Suspend history state on the target document
    let suspensionID = await hostControl.suspendHistory({
      "historyStateInfo": {
        "name": "Your History State Name",
        "target": [{
          _ref: "document",
          _id: documentID
        }]
      }
    });

    /*
    Do stuff here. 
    It can be batchPlay or any other javascript code
    */
    const entry = await require("uxp").storage.localFileSystem.getEntryForPersistentToken(localStorage.getItem("persistent-token"));

    const newFile = await entry.createFile(app.activeDocument.name, {
      overwrite: true
    });

    const saveFile = await require("uxp").storage.localFileSystem.createSessionToken(newFile);

    await hostControl.resumeHistory(suspensionID);
  }

});