Lightstrip not accessible

Hi all,

I have been using two Yeelight light strips for several years and they have always worked.

For about two months now, however, I have been having trouble with both of them - the control via time schedules no longer works!

After a short time, the time control no longer works and the previously reset light strips can no longer be addressed!

Since then, the app has been updated, but nothing has changed in the faulty behaviour of the light strips.

Does anyone have any advice?