Zammad calendar wont load in Thunderbird, Nextcloud or Gmail

If I copy the calendar URL from my profile ( and paste it into my calendar programs, none of them work.

I have set one ticket (assigned to me) to have a “Pending reminder” date and time. Im assuming this should show in the calendar.

  • Used Zammad version: 6.0.0-1692176490.0e2399eb.focal
  • Used Zammad installation type: package
  • Operating system: Ubuntu 20.04.6 LTS
  • Browser + version: Brave Version 1.57.47

Expected behavior:

  • Ticket which has Pending Reminder date/time set should show in these 3rd party calendar apps.

Actual behavior:

  • Thunderbird cannot find a calendar.
  • Nextcloud and Gmail both appear to connect, or at least save a calendar, but no entries appear.

Firstly, Is my understanding how this works correct?

Secondly, does anyone have any suggestions on how to fix.

if i paste the calendar url into a browser, the tickets appear in ICAL format, so the link works.


The calendar apps you’re using have to support basic authentication.
As far as I’m aware neither Gmail nor Nextcloud actually do support that.

Thunderbird for example does work perfectly with ical URLs from Zammad.

Thanks @MrGeneration

I just get this error. Am i doing something wrong?


Now it’s no longer working for me too.

I’ve been so keen and created an issue for you, you can subscribe to it to get updates when it’s fixed:

For completeness, as I found another bug on that way, also note this issue which might add to the issue for you:

thanks @MrGeneration