Calendar invitation error: “There was an error updating your attendance status”

[xplosionmind]

Describe the bug

When inviting people to an event created on the calendar app, the invited people cannot accept the invitation.

Context

• Hardware: VPS bought online
• YunoHost version: 11.2.20.2
• I have access to my server: Through SSH
• Are you in a special context or did you perform some particular tweaking on your YunoHost instance?: no

Steps to reproduce

• Create an event from https://cloud.example.com/apps/calendar/dayGridMonth/now/new/sidebar/0/1720263623/1720267223
• Invite people
• When people receive the invitation email and click on the link, they see this:
  

Expected behaviour

Invited people should be able to accept the invitation!

Logs

I don’t really know how to debug this, I need guidance, but I am fully available to help solve this.
Thanks a lot!