I want to use KOrganizer for integration with Plasma 6. I can’t set up my calendars from Fastmail as I’m prompted with this:
If I do it manually, https://caldav.fastmail.com/ does not connect with a 404 error.
I am on KDE Neon with Plasma 6.4.5 and KOrganzier 25.08.01.
Thank you!

