If you are experiencing problems with the calendar and just:in, please first check the following:
- Please check if the just:in application has permissions to access the calendar application
- This setting can be found within the System Preferences - Security and Privacy
- Then switch to the Privacy tab and then choose the calendar application
- There just:in must be selected
If this is working and you are still having problems, please fo the following:
- Quit the just:in engine application
- Open the calendar application and delete all just:in related calendars, if some are there
- Open the just:in application again and check if channels are activated
- Then calendars should be created automatically
If these steps are not working, please create a support ticket.