When I click on the OpenDesktop list item in the KCM, nothing happens. In the console log, I see: QDBusError("org.freedesktop.DBus.Error.ServiceUnknown", "The name is not activatable") But that's it. It never shows a login prompt.
I was able to log into it in the past; see Bug 437282. So this appears to be a regression sometime in the past year and a half.
Can't reproduce, I get the login prompt just fine. However I get an "invalid login" error for an account that works fine in a browser.
I think I'm experiencing the same issue that I am in Bug 468298 with the Google account. When I click on the OpenDesktop account list item in the KCM, nothing happens and the console log says: QDBusError("org.freedesktop.DBus.Error.ServiceUnknown", "The name is not activatable")
Harald has helpfully been debugging this with me and it doesn't look like there is any issue in KDE code here. So far it's looking like it might be caused by a bug in dbus-broker itself. Either way, no KDE issue; closing.
Actually it was our bug after all. It's fixed with https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/2835.