I had an owncloud DAV groupware resource and everything worked fine. The name of this resource was "ownCloud" Now, I added a nextcloud calendar and accidentally used again the name "ownCloud" (the name was suggested by the configuration wizard). Afterwards, I could only see the old calendar but not the new one in korganizer. However, in the akonadiconsole I could see both. Next, I deleted the calendar in korganizer and rebooted the system. Result: korganizer showed me neither the new nor the old calender, in akonadiconsole I could see the new calendar. Next, I deleted the new calendar in akonadiconsole and rebooted the system. Result: I could not see a calendar in korganizer or akonadiconsole (result as expected) Next, I created again my new nexcloud calendar in korganizer but used a completely different name. However, the new calendar is not visible in korganizer (but visible in akonadiconsole). The KOrganizer version is 4.14.10, but there was no such field.
After a few reboots the calendar became again visible in korganizer. A concrete suggestion: Change the wizard in a way that it does not suggests calendar names that already exist.
I have a similar issue: completely new installation of manjaro kde and kontact. My nextcloud DAV groupware resource also doesn't show up. I am usingthe same configuration on another machine (neon) and it works. Also it isn't manjaros fault, a few days ago the manjaro machine run neon and it had the same problem.
(In reply to Andreas Hurka from comment #2) > I have a similar issue: > completely new installation of manjaro kde and kontact. > My nextcloud DAV groupware resource also doesn't show up. I am usingthe same > configuration on another machine (neon) and it works. > Also it isn't manjaros fault, a few days ago the manjaro machine run neon > and it had the same problem. Just figured out, when I add a calender in the online application, it shows up. Looks like adding calenders from KOntact doesn't work.