SUMMARY
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Since an recent update, Google Groupware entries are no longer visible in the calendar although it is added and "Ready" in the list of "Calendars". Restarting or adding the Google account again has no effect at all. Very annoying, as it wrke flawlessly a month ago. 
***


STEPS TO REPRODUCE
1. Open KOrganizer.
2. Go to "Settings"/"Configure KOrganizer/"General"/"Calendars", then add/restart/modify Google account.
3. Google sasy all Ok, but nothing happens - no entries visible and accessible in the Calendar.

OBSERVED RESULT
No Google calendar entries visible and accessible in the Calendar.

EXPECTED RESULT
All Google calendar entries should be visible and accessible (alongside withthose of other calendars).

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: OpenSUSE Tumbleweed, all software latest version
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION
VERY FRUSTRATING as it worked already - Korganizer is useless without the option to include/access Google resources!