Obsidian-task-calendar not working

Things I have tried

I followed the steps according GitHub - 702573N/Obsidian-Tasks-Timeline: A custom view build with Obsidian-Dataview to display tasks from Obsidian-Tasks and from your daily notes in a highly customisable timeline
Plugins are installed: Tasks GitHub - obsidian-tasks-group/obsidian-tasks: Task management for the Obsidian knowledge base. - Dataview

What I’m trying to do

This is the error I get

What I do wrong? Can anybody give som help?