LineageOS-Etar calendar doesn't work

LineageOS 21-20240817-Nightly-bluejay

I have always had problems with the integrated calendar of LineageOS. No matter which version, no matter which smartphone.

There were always problems with the alarm or notification.

Now I urgently need a calendar with an alarm sound and have tested it again. Absolutely nothing happened. No notification sound. Nothing.

Does anyone have the same problem?

The calendar is based on Etar. I have tried to download Etar, but it does not work. I have tried other calendars. Hard to believe. The same problem.

I just want an appointment or task to ring with a sound like an alarm clock, for example, until I turn it off. Why the heck it doesn't work? ...

“Do not disturb” is automatically activated from a certain time. However, Calendar is in the list of apps that can interrupt it.

Everything works, but never this calendar. And so I still have to use paper calendars.