In the error console I see this entry:
Code: Select all
Zeitstempel: 13.07.2019, 10:25:12
Fehler: [calCachedCalendar] replay action failed: null, uri=https://mail.xxx.de/calendars/xxx/Calendar/Stiftung, result=2147500037, operation=[xpconnect wrapped calIOperation]
Quelldatei: file:///C:/Users/xxx/AppData/Roaming/Mozilla/SeaMonkey/Profiles/xxx.default/extensions/%7Be2fda1a4-762b-4020-b5ad-a41df1933103%7D/calendar-js/calCachedCalendar.js
Zeile: 331
In SM 2.49.5 it works as expected with the same credentials and settings.