BG96 connect to leshan server fail by LwM2M

Use “AT+QLWM2M?” command and configure file(bootstrap.ini, carrier_apn_cfg, lwm2m_cfg and qcli_config)
to connect to leshan Lwm2m server(coap://leshan.eclipseprojects.io:5683) using a non secure connection
but can not register…
The log as below:

Net: Net Registered
dss_netapp: DSS_NetApp Registered
atfwd_cli_app: Atfwd_Cli_App Registered
LWM2M_EXT: LWM2M_EXT Registered

Command List:
Commands:
1. Help
2. Exit

Subgroups:
3. Net
4. dss_netapp
5. atfwd_cli_app
6. LWM2M_EXT

LWM2M: CLI registered
LWM2M: LWM2M_LOG:Carrier type = 0
LWM2M:
LWM2M: REG EP NAME = 4
LWM2M:
LWM2M: BOOTSTRAP EP NAME = 4
LWM2M:
LWM2M: LWM2M_LOG: bootstrap_name --> urn:imei:866425030064275
LWM2M:
LWM2M: State: STATE_REGISTER_REQUIRED
LWM2M: State: STATE_REGISTERING

Which configure parameter error cause registering fail?
Here’s my config file https://drive.google.com/file/d/1axldayXSLdDIFRcl91xa7Nc7i0S_zENt/view

Thanks.