Feed not working on Google but working on Apple Calendar

[Alex Toulemonde]

This subscription feed is working on Apple Calendar but not working on Google Agenda:

https://app.lamainverte.ca/ical/mon-potager-2897.ics

This exact URL is also validated by https://icalendar.org/validator.html

This is the event structure:

function presentTaskIntoIcalEvent(task: any) {
  let icalEvent: any = {
    title: task.name,
    start: convertDateToIcalFormat(task.startDate),
    url: task.url,
    categories: ['Potager'],
    calName: 'Mon potager',
    transp: 'TRANSPARENT',
  }
  if (task.endDate) {
    icalEvent['end'] = convertDateToIcalFormat(task.endDate)
  } else {
    icalEvent['duration'] = { days: 1 }
  }
  return icalEvent
}

And the array of events is sent to the feed with:

icalRouter.get('/ical/:selectionSlug.ics', async (request, response) => {
    const events = getAllEvents()
    ics.createEvents(events)
    response.setHeader('Content-Type', 'text/calendar')
    response.send(icalFeed)
})

Any help would be appreciated. I didn't find any Google-specific fields in the doc.