OS: Debian Stretch
Lightening version 220.127.116.11
I have created a calendar on my Synology NAS, copied the CalDav link for
the calendar and used it as per instructions here:
The Lightening will not sync the events on the NAS calendar. It
repeatedly requests I authenticate my credentials, which are correct.
The calendar is then deactivated.
I have connected to the calendar using the CalDav link on my Android
device without any problems.
How should I proceed with troubleshooting this?