SUMMARY What sort of calendar app loses your appointments? Isn't that sort of fundamental to the app? Is this the alpha version? STEPS TO REPRODUCE 1. install from standard Ubuntu repository using apt 2. use it for a few days 3. discover that it has lost all your data OBSERVED RESULT EXPECTED RESULT SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION
The report doesn't contain any useful information that we could use to reproduce, diagnose or fix the problem. If you see this behavior again, please describe how exactly data are lost, what calendar connector you've been using, if there's anything particular about your setup. Also the KOrganizer version is said to be 5.13.3, which is a very old version - if you can please try latest version of KOrganizer, the problem may have been fixed in the meantime.