I restart it in the terminal, and it works:

Code:

$ sudo -i
# bluetoothctl
[bluetooth]# power off
[bluetooth]# power on
[bluetooth]# scan on
[bluetooth]# connect XX:XX:XX:XX:XX:XX (your bluetooth address)
[Arc Touch Mouse SE]# trust
[Arc Touch Mouse SE]# pair
[Arc Touch Mouse SE]# unblock
[Arc Touch Mouse SE]# power off
[bluetooth]# power on