Bricked the messages system?

I tired to make a messagesUI replacement app. So I uninstalled Messages UI, then installed my app. Now I get the error message:

Device connection failed, Error: Dependency type 'module' not supported

Whenever I try to install the apps "messages" or "Message UI". I did a reset to factory, but still I have this error.
The code I uploaded was:
===boot.js===

Bangle.on("message", (type, msg) => require("xxlmessage").listener(type, msg));

===messagexxl.js===

var drawTimeout; // = undefined;
var xpos = 2*g.getWidth();
var loopCount=0;

// schedule a draw for the next 30 FPS
function queueDraw() {
    if (drawTimeout) {clearTimeout(drawTimeout);}
    drawTimeout = setTimeout(function() {
        drawTimeout = undefined;
        draw();
    }, 32 - (Date.now() % 32));
}

function drawBackground() {
    g.setBgColor(0,0,0);
    g.setColor(1,1,1);
    g.clear();
}

function stop(){
    if (drawTimeout) {clearTimeout(drawTimeout);}
    load();
}

function draw(){
    Bangle.setLocked(false); // keep the touch input active
    drawBackground();
    g.setFont('6x8:5x10');
    g.setFontAlign(-1, -1);

    var gw = g.getWidth();
    var text = "This is a test with a longer message to try...";
    var wtot = g.stringMetrics(text).width;

    g.setBgColor('#000000');

    g.setColor('#ffffff');
    g.drawString(text, xpos, 0);
    g.drawString(text, xpos-gw-32, g.getHeight()/2);

    g.reset();
    xpos -= 3;
    if(xpos < -wtot-gw*2 ) {
        ++loopCount;
        if(loopCount > 2){
            stop();
        }
        xpos=3*gw;
    }


    // widget redraw
    Bangle.drawWidgets();
    queueDraw();
}

Bangle.loadWidgets();

Bangle.on("message", (type, msg) => {
    if (!msg) return;
    if(type === 'text' && msg.t !== 'remove'){
        msg.handled = true; // don't do anything else with the message
        draw();
    }
});

Bangle.on('touch', function(b,xy){
    stop();
});

Bangle.setUI("clock");
Bangle.drawWidgets();

=== metadata.json ===

{
  "id": "xxlmessage",
  "name": "XXL Message",
  "version": "0.01",
  "shortName": "XXL Msg",
  "description": "App to display large notifications from iOS and Gadgetbridge/Android",
  "icon": "app.png",
  "type": "app",
  "tags": "tool,system",
  "supports": ["BANGLEJS","BANGLEJS2"],
  "readme": "README.md",
  "screenshots": [{"url":"screenshot.png"}],
  "storage": [
    {"name":"xxlmessage.app.js","url":"xxlmessage.js"},
    {"name":"xxlmessage.boot.js","url":"boot.js"},
    {"name":"xxlmessage.img","url":"app-icon.js","evaluate":true}
  ]
}