Sidecar Error Message - Connection to "Katharina's iPad" not possible

Hi Everybody,

I don´t know what else I should try. Since today my Sidecar is not working any more. It was all fine until today.

The error Message is:

The connection to the device was aborted due to a timeout.

Do you have any ideas how I can troubleshoot this? I did of course already checked everything Icloud id, Wifi, Bluetooth, Handoff.

Even when I try to connect my ipad via cable with the mac it doesn´t work.

I´m very lost now.

Anything you can think off?

Thank you for your help!