Error: uncaught exception.

[THREAD]
Thread-5
[EXCEPTION]
java.lang.NullPointerException: Attempt to invoke virtual method 'void com.algobase.share.bluetooth.BluetoothLeService.g(android.bluetooth.BluetoothGattCharacteristic)' on a null object reference
Attempt to invoke virtual method 'void com.algobase.share.bluetooth.BluetoothLeService.g(android.bluetooth.BluetoothGattCharacteristic)' on a null object reference

[STACK TRACE]
java.lang.NullPointerException: Attempt to invoke virtual method 'void com.algobase.share.bluetooth.BluetoothLeService.g(android.bluetooth.BluetoothGattCharacteristic)' on a null object reference
	at com.algobase.share.bluetooth.a.a(SourceFile:221)
	at z.a.run(SourceFile:6)

com.algobase.share.bluetooth.a.a(SourceFile:221)
z.a.run(SourceFile:6)