Bluetooth 蓝牙错误：适配器操作安装失败

我正在尝试用Raspberry pi 2中的BLE（内核版本：Linux raspberrypi 4.1.7-v7+和Bluez版本：5.11）创建一个GATT服务。我已将leoxsys BLE适配器与pi连接。我可以作为iBeacon做广告，广告信号在“信标比特”iOS应用程序中检测到。基于此，我运行命令

sudo/usr/sbin/bluetooth--plugin=time-n

来启动示例GATT服务。它返回了以下信息：

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

如何解决以下错误：

bluetoothd[4818]: Failed to init time plugin
bluetoothd[4818]: adapter_ops_setup failed

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每；当你运行时，你会得到什么？

lsmod | grep blue

当我运行时，我得到了以下信息：

bluetooth 327544 26 bnep，btbcm，btusb，rfcomm，btintel

rfkill 16659 3 cfg80211，bluetooth