TypeError: Cannot read properties of undefined (reading 'timeZone')

[sentry-io]

Sentry Issue: CAL-597

TypeError: Cannot read properties of undefined (reading 'timeZone')
  File "@calcom/web/../../packages/lib/CalEventParser.ts", line 33, in getWhen
    ${calEvent.attendees[0].timeZone}
  File "@calcom/web/../../packages/lib/CalEventParser.ts", line 339, in getRichDescription
    ${getWhen(calEvent, t)}
  File "@calcom/web/../../packages/emails/lib/generateIcsString.ts", line 68, in __WEBPACK_DEFAULT_EXPORT__
    description: getRichDescription(event, t),
  File "@calcom/web/../../packages/emails/lib/generateIcsFile.ts", line 34, in generateIcsFile
    content: generateIcsString({
  File "@calcom/web/../../packages/emails/templates/organizer-scheduled-email.ts", line 43, in {OrganizerScheduledEmail#2}.getNodeMailerPayload
    icalEvent: generateIcsFile({
...
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