@Dennis-010 Thanks for figuring all of this out. I also reverted back to the X11 window driver. For completeness, just add --rotate right to the command: customCommand: { // Optional, See "Using Custom Commands" below monitorOnCommand: 'xrandr -d :0 --output HDMI-1 --auto --rotate right', monitorOffCommand: 'xrandr -d :0 --output HDMI-1 --off' },

@Dennis-010 said in MMM-Calendar not seem to load .ics: You are a genius!! well, i don’t know about that… I’ve just spent the last few years fixing bugs in there

I think the problem was somewhere in my mailserver. After a reboot all the appointments magicly reappeared. Thank you for responding.