Google forms, on form submit sent email with attachments

Question

I am trying to send an automatic email (text used from a google doc template) to all form responders that includes an attachment. and it keeps returning: Error TypeError: Cannot read property 'namedValues' of undefined onFormSubmit @ Code.gs:14 I'm not sure what where I'm going wrong

My script belw:

var EMAIL_TEMPLATE_DOC_URL = 
'https://docs.google.com/document/d/1u89xsr09fWZ3kMmfQg2kagvZ_GiYQl3P4QkX6wPWTzw/edit?usp=sharing';
var EMAIL_SUBJECT = 'Membership Application';

var formvehicle = DriveApp.getFileById('1Q2Y7ZfUv4bCmdSmmLDQyvT0MCffp3T3P');

function installTrigger() {
  ScriptApp.newTrigger('onFormSubmit')
      .forSpreadsheet(SpreadsheetApp.getActive())
      .onFormSubmit()
      .create();
}

function onFormSubmit(e) {
  var responses = e.namedValues;
  var email = responses['Email Address'][0].trim();
  var name = responses.Name[0].trim();

    MailApp.sendEmail({
      to: email,
      subject: EMAIL_SUBJECT,
      htmlBody: createEmailBody(name, topics),
      attachments: [formvehicle.getAs(MimeType.PDF)]
    })}