Newbie help with a config problem

Hi Everybody,
i have this error apearing in hassio log
Invalid config

The following components and platforms could not be set up:

Please check your config.

the section in my config looks like this ,
can anyone advise how i get this bit working without getting the above error please

#################################################
device_tracker:
- platform: bluetooth_tracker

###############################

   - platform: ping
     interval_seconds: 30
     consider_home: 60
     hosts:
     Jo_phone: 192.168.8.30
     Simon_phone: 192.168.8.50
     
   - platform: huawei_lte
     host: 192.168.8.1
     username: ########
     password: ########
     new_device_defaults:
     track_new_devices: true
     hide_if_away: false

###############################