Successfully called the connect api but following command with the fingerprint failed

[SharonyuFu]

{"name": "camera._connect", "state": "done", "results": {"Fingerprint": "-QLN_pTR48E=", "last_info": {"state": "idle", "version": "1.3.061016", "moduleVersion": "", "GPSState": 1}, "_cam_state": 0, "machine": "pro2", "sys_info": {"k_v": "4.4.38", "p_v": "K_1.1.0", "r_v": "1.2.0", "sn": "XXXXXX", "h_v": "V1.0.4_2018.10.18", "s_v": "Linux version 4.4.38 (root@skymixos-Inspiron-3668) (gcc version 4.8.5 (GCC) ) #37 SMP PREEMPT Sat Nov 24 14:55:45 CST 2018\n"}}}

{ "name":"camera._takepicture" }

{"name": "camera._takepicture", "state": "exception", "error": {"code": "disabledCommand", "description": "camera not connected"}}