I tried to write a module for the first time. It was supposed to show the menu including the prices of the canteen at our university, but for some reason I don’t get an output. I tried to run the logic and a test module with „hello world“ and both worked. I attached to this message my code and I hope that someone can help me out with this issue.

Here ist my code:

Module.register("MMM-Test", {
  defaults: {},
  start: function () {
	this.count = 0
  	var timer = setInterval(()=>{
    		this.updateDom()
    		this.count++
  		}, 30000) // 1000 = 1s
	},
  getDom: function() {
    var element = document.createElement("div")
  element.className = "myContent"
    var subElement = document.createElement('table');
    var tr = document.createElement('tr');
    var td1 = document.createElement('td');
    var td2 = document.createElement('td');
    var request = require('request');
    var text1;
    var text2;
    var heute = new Date().toISOString().substr(0,10);
    var cnt = 0;
 request({
    url: 'https://openmensa.org/api/v2/canteens/838/days/'+heute+'/meals',
    json: true
 }, function(error, response, body) {
        element.innerHTML = ('\nCAFETERIA EAH am ' +  heute.substring(8,10)+ '.'+heute.substring(5,7) +'.'+heute.substring(0,4)+':');
	if (body.length < 1){
		text1 = document.createTextNode('Heute geschlossen!');
	}
	else {
	  while (body.length > cnt) {
		text1 = document.createTextNode((body[cnt].name));
		text2 = document.createTextNode(body[cnt++].prices.employees.toFixed(2) +' €');
		}
	}
});
    td1.appendChild(text1);
    td2.appendChild(text2);
    tr.appendChild(td1);
    tr.appendChild(td2);
    subElement.appendChild(tr);
    subElement.id = "COUNT"
    element.appendChild(subElement)
return element
},
  notificationReceived: function() {},
  socketNotificationReceived: function() {},
})