I'm trying to display data from an HTMLService form in an ui.alert. I tried alternative solutions, none of which seem to work I'm out of ideas at this point, I don't understand why the code isn't working…

(Script is container bound)

AppScript:

function showCustomOrder() {
  const ui = SpreadsheetApp.getUi();
  var html = HtmlService.createTemplateFromFile('CustomOrderHTML')
  .evaluate()
  .setWidth(1000)
  .setHeight(700);
  ui.showModalDialog(html, '