How to accept received calendar invites on android?

Hello,

I manage my calendar with my Nextcloud server. I synchronize the calendar with DAVx5 with my Android smartphone. This allows me to create and manage calendar appointments and invite other people to appointments.

However, when I am invited, I can only accept appointments from my PC with a program like Outlook or emClient. The appointment is then entered in the calendar. The same applies to canceled appointments. These then disappear from the calendar.

On Android, I can accept the invitation email, but the appointment is not entered in the calendar. No matter which mail app I use. Is this related to a setting in DAVx5, or are there other reasons for this? Unfortunately, I can’t find a solution for this and don’t know where to look for it.

I hope someone can help me with this.