Bluetooth error

systemctl | grep -i blue

sudo rmmod btusb

sudo modprobe btusb

Hard Refresh

End Service (If it is running)

sudo systemctl stop bluetooth.service

Removes Hardware Emulation

sudo systemctl unmask bluetooth.service

Start Service

sudo systemctl start bluetooth.service

sudo systemctl enable bluetooth

Re-Enable Hardware Emulation

sudo systemctl mask bluetooth.service 

sudo rmmod btusb

sudo modprobe btusb

Unblock from rfkill

rfkill unblock all

$ cat /lib/systemd/system-sleep/bt
#!/bin/sh

case $1 in
  post)
    sleep 5
    rfkill block `rfkill list | grep hci | cut -d: -f1`
    sleep 1
    rfkill unblock `rfkill list | grep hci | cut -d: -f1`
    ;;
esac

sudo service bluetooth restart

btnum=`rfkill list|grep hci0| cut -f 1 -d ':'`
rfkill block $btnum
rfkill unblock $btnum