Can't see any devices in Hass

Hello Hass,

Suddenly my Hass is offline. It seems to run ok

The devices are also recognized by my Synology:

image

ls -al /dev/ttyACM0
crw------- 1 root root 166, 0 Feb 1 22:11 /dev/ttyACM0

However all the devices are not showing up in Hass.

Anyone any idea?

Thnx a lot