ACPI problem on Precision 3561 running Win11Pro

In my eventlog I can see 2 messages that appear over and over. Events 20 and 21.

20: The hardware real-time clock was not queried because evaluation of the ACPI Time and Alarm Device method failed. Status: 3221225659.

21: The hardware real-time clock was not set because evaluation of the ACPI Time and Alarm Device method failed. Status: 3221225659.

The statuscode indicates the device is missing.

However, device manager shows nothing special and ACPI devices are present under "System Devices".

I installed the most recent bios and drivers, but nothing helps.

Does anyone know what is going on here?

Kind regards,

Peter