I am trying to create a GATT Service with BLE in Raspberry pi 2 (Kernel Version: Linux raspberrypi 4.1.7-v7+ and Bluez version: 5.11). I have connected leoxsys BLE adapter with the pi. I am able to advertise as iBeacon and the advertising signal is detected in "Beacon Bits" iOS App. Based on this tutorial I ran the command sudo /usr/sbin/bluetoothd --plugin=time -n to start the example GATT service. It returned the following:

bluetoothd[4818]: Bluetooth daemon 4.99 bluetoothd[4818]: Starting SDP server bluetoothd[4818]: Ignoring (cli) pnat bluetoothd[4818]: Ignoring (cli) audio bluetoothd[4818]: Ignoring (cli) sap bluetoothd[4818]: Ignoring (cli) input bluetoothd[4818]: Ignoring (cli) serial bluetoothd[4818]: Ignoring (cli) network bluetoothd[4818]: Ignoring (cli) proximity bluetoothd[4818]: Ignoring (cli) service bluetoothd[4818]: Ignoring (cli) gatt_example bluetoothd[4818]: Ignoring (cli) alert bluetoothd[4818]: Ignoring (cli) health bluetoothd[4818]: Ignoring (cli) thermometer bluetoothd[4818]: Ignoring (cli) hciops bluetoothd[4818]: Ignoring (cli) mgmtops bluetoothd[4818]: Ignoring (cli) formfactor bluetoothd[4818]: Ignoring (cli) storage bluetoothd[4818]: Ignoring (cli) adaptername bluetoothd[4818]: Ignoring (cli) wiimote bluetoothd[4818]: Ignoring (cli) dbusoob bluetoothd[4818]: Failed to init time plugin bluetoothd[4818]: adapter_ops_setup failed

How to resolve the following error: