Here is the code:

const ss = SpreadsheetApp.getActiveSpreadsheet();
const ws = ss.getSheetByName("StudentReport_all");
const range = ws.getRange(4,1,ws.getLastRow(),ws.getLastColumn());
const data = range.getValues();

var form = FormApp.openById("154QspMd1P4RmTRDnOQHL06dU-KvL8FPU53wHYcar09U");
  //form.setRequireLogin(true);

var formUrl = form.getPublishedUrl();
var title = form.getTitle();
var descriptionText = form.getDescription();

function sendForm() {
  
  var subject = "Response Needed: " + form.getTitle()
  var response = UrlFetchApp.fetch(formUrl);
  var template = HtmlService.createHtmlOutput(response);
  
  //var htmlBody = HtmlService.createHtmlOutputFromFile("teacherEmail").getContent();
var htmlBody = template.getContent();
//HtmlService


  var p1Email = data[9][3];
  var p2Email = data[10][3]
  var p3Email = data[11][3]
  var p4Email = data[12][3]
  var p5Email = data[13][3]
  var p6Email = data[14][3]


GmailApp.sendEmail(
      [p1Email],
      subject,
      htmlBody
  )
 return htmlBody
  Logger.log(htmlBody);
}

When I click the button in Google Sheets, an email should send to the entered emails and the google form template should show up in the email. But when I click the button, instead of the google form template, the raw html shows up. How do I fix this?