Google Form -> Sheet -> Calendar

Question

I am trying to write the Script to turn single rows of a Spreadsheet into a Google Calendar event and invite the emails in one of the columns to the event. This will be used in a school setting where students are signing up for workshops and I want to add it to their Google Calendar.

Link to Demo Spreadsheet

Here is the code I've been working with from another forum on here. It hasn't been able to send the invite/add to the other calendar.

function main() {
  var ss = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet()
  var values = ss.getDataRange().getDisplayValues()
  var lc = ss.getLastColumn()
  for (var i = 1; i < values.length; i++) {
    var evId = processLine(values[i], lc) // create the event and get id of the event
    ss.getRange(i, lc).setValue(evId)     // write the id of the event in the last column of the sheet
  }
}

function processLine(x, lc) {
  var jobType = x[5]
  var evId = x[lc-1]

  // check job type
  if (jobType == 1 && evId == '') {
    // summary
    // description
    var freq = x[6]
    var description = type + ' - ' + dur + ' - ' + freq
    // location
    var location = x[10]
    // date
    var start = x[8]
    var end = x[9]
    var date = x[7]
    // formated date
    var eStart = new Date(date + ' ' + start)
    var eEnd = new Date(date + ' ' + end)
    // options
    var opts = {
      location: location
    }

    // SINGLE EVENTS
    if (freq == 'Once Off') {
      var ev = CalendarApp.createEvent(summary, eStart, eEnd, opts)
    } else {

// CREATE EVENT
      var ev = CalendarApp.createEventSeries(summary, eStart, eEnd, recurrence, opts)
    }
    // ADD PARAMETERS
    ev.setColor(CalendarApp.EventColor.YELLOW)
    ev.setDescription(description)
    console.log(ev.getId())
    return ev.getId()

  }
}