错误:发送邮件后无法设置邮件头。在validateHeader(\u http_外向型。js:491:11)

我把一个小的待办事项列表应用程序在节点和我得到上面的错误。我还使用ejs作为模板。我的应用程序.js文件看起来像这样。

const express = require("express");
const bodyParser = require("body-parser");
 //const request = require('request');
const date = require(__dirname + "/date.js")

//console.log(date());
const app = express();

app.use(express.static("public"));

const listItems = ['cooking', 'shopping', 'watch TV', 'go to the gym'];
const workItems = []

app.use(bodyParser.urlencoded({extended: true}));

app.set("view engine", "ejs");

app.get("/", function(req, res){

 const day = date.getDate();

 res.render("list", { listTitle: day, items: listItems });

 });

app.post('/', function(req, res){
  //post items
 const item = req.body.newItem;
 if (req.body.list === "Work") {
  workItems.push(item)
  res.redirect("/work")
  } else {
 listItems.push(item);
 res.redirect("/")
 }

//
 listItems.push(item);
 res.redirect("/")

})

app.get('/work', function(req, res){

res.render("list", {listTitle: "Work List", items: workItems});

});

app.post('/work', function(req, res){
//post items
 let item = req.body.newItem;
 workItems.push(item)
 res.redirect("/work")
 })

 app.listen(3000, function(){
 console.log("Server started on port 3000.");
 });