openHABian hassle-free openHAB Setup

This morning I switched from openhab 2.0.0-1 (Release Build) to openHAB 2.1.0~20170227013157-1 (Build #814)

Edit: Could this issue be related to sudo openhabian-config when I prepared the Serial Port two days ago?
(see post #751 above)

Edit: Did you play around with wifi or bluetooth? No, not as far as I know.