How to get Gnome Calendar online calendars working

Hello, the KDE Kontact app works but is very dated UI wise and I really like the look of Gnome Calendar. I was able to download and install it through Bazaar and the application opens but the online functionality does not work. My calendars are on a Caldav server which Gnome Calendar supports but when I try to add the calendar, I get the error `Cannot connect to D-Bus service “org.gnome.evolution.dataserver.Sources5“ with object path “/org/gnome/evolution/dataserver/SourceManager“, no owner found`

I tried going into Flatseal and enabling D-Bus session bus and D-Bus system bus and restarting calendar but no luck. And `org.gnome.evolution.dataserver.Sources5` is already auto populated: