I get the same java error when adding my sensor from Inbox as item (and afterwards have no channels and it immediatly goes to “offline gone”).
In case it helps and someone know what “forced updates” means, here the output from the tasmota:
12:05:37 MQT: homeassistant/switch/0BDDEE_RL_1/config = (retained)
12:05:37 MQT: homeassistant/light/0BDDEE_LI_1/config = (retained)
12:05:37 MQT: homeassistant/switch/0BDDEE_RL_2/config = (retained)
12:05:37 MQT: homeassistant/light/0BDDEE_LI_2/config = (retained)
12:05:37 MQT: homeassistant/switch/0BDDEE_RL_3/config = (retained)
12:05:37 MQT: homeassistant/light/0BDDEE_LI_3/config = (retained)
12:05:37 MQT: homeassistant/switch/0BDDEE_RL_4/config = (retained)
12:05:37 MQT: homeassistant/light/0BDDEE_LI_4/config = (retained)
12:05:37 MQT: homeassistant/switch/0BDDEE_RL_5/config = (retained)
12:05:37 MQT: homeassistant/light/0BDDEE_LI_5/config = (retained)
12:05:37 MQT: homeassistant/switch/0BDDEE_RL_6/config = (retained)
12:05:37 MQT: homeassistant/light/0BDDEE_LI_6/config = (retained)
12:05:37 MQT: homeassistant/switch/0BDDEE_RL_7/config = (retained)
12:05:37 MQT: homeassistant/light/0BDDEE_LI_7/config = (retained)
12:05:37 MQT: homeassistant/switch/0BDDEE_RL_8/config = (retained)
12:05:37 MQT: homeassistant/light/0BDDEE_LI_8/config = (retained)
12:05:37 MQT: homeassistant/binary_sensor/0BDDEE_BTN_1/config = (retained)
12:05:37 MQT: homeassistant/binary_sensor/0BDDEE_BTN_2/config = (retained)
12:05:37 MQT: homeassistant/binary_sensor/0BDDEE_BTN_3/config = (retained)
12:05:37 MQT: homeassistant/binary_sensor/0BDDEE_BTN_4/config = (retained)
12:05:37 MQT: homeassistant/binary_sensor/0BDDEE_SW_1/config = (retained)
12:05:37 MQT: homeassistant/binary_sensor/0BDDEE_SW_2/config = (retained)
12:05:37 MQT: homeassistant/binary_sensor/0BDDEE_SW_3/config = (retained)
12:05:37 MQT: homeassistant/binary_sensor/0BDDEE_SW_4/config = (retained)
12:05:37 MQT: homeassistant/binary_sensor/0BDDEE_SW_5/config = (retained)
12:05:37 MQT: homeassistant/binary_sensor/0BDDEE_SW_6/config = (retained)
12:05:37 MQT: homeassistant/binary_sensor/0BDDEE_SW_7/config = (retained)
12:05:37 MQT: homeassistant/binary_sensor/0BDDEE_SW_8/config = (retained)
12:05:37 MQT: homeassistant/sensor/0BDDEE_BME280_Temperature/config = {“name”:“Tasmota BME280 Temperature”,“stat_t”:“~SENSOR”,“avty_t”:“~LWT”,“frc_upd”:true,“pl_avail”:“Online”,“pl_not_avail”:“Offline”,“uniq_id”:“0BDDEE_BME280_Temperature”,“device”:{“identifiers”:[“0BDDEE”],“connections”:[[“mac”,“60:01:94:0B:DD:EE”]]},“~”:“tasmota/tele/”,“unit_of_meas”:“°C”,“val_tpl”:“{{value_json[‘BME280’].Temperature}}”,“dev_cla”:“temperature”} (retained)
12:05:37 MQT: homeassistant/sensor/0BDDEE_BME280_Humidity/config = {“name”:“Tasmota BME280 Humidity”,“stat_t”:“~SENSOR”,“avty_t”:“~LWT”,“frc_upd”:true,“pl_avail”:“Online”,“pl_not_avail”:“Offline”,“uniq_id”:“0BDDEE_BME280_Humidity”,“device”:{“identifiers”:[“0BDDEE”],“connections”:[[“mac”,“60:01:94:0B:DD:EE”]]},“~”:“tasmota/tele/”,“unit_of_meas”:“%”,“val_tpl”:“{{value_json[‘BME280’].Humidity}}”,“dev_cla”:“humidity”} (retained)
12:05:37 MQT: homeassistant/sensor/0BDDEE_BME280_Pressure/config = {“name”:“Tasmota BME280 Pressure”,“stat_t”:“~SENSOR”,“avty_t”:“~LWT”,“frc_upd”:true,“pl_avail”:“Online”,“pl_not_avail”:“Offline”,“uniq_id”:“0BDDEE_BME280_Pressure”,“device”:{“identifiers”:[“0BDDEE”],“connections”:[[“mac”,“60:01:94:0B:DD:EE”]]},“~”:“tasmota/tele/”,“unit_of_meas”:“hPa”,“val_tpl”:“{{value_json[‘BME280’].Pressure}}”,“dev_cla”:“pressure”} (retained)
12:05:37 MQT: homeassistant/sensor/0BDDEE_status/config = {“name”:“Tasmota status”,“stat_t”:“~HASS_STATE”,“avty_t”:“~LWT”,“frc_upd”:true,“pl_avail”:“Online”,“pl_not_avail”:“Offline”,“json_attributes_topic”:“~HASS_STATE”,“unit_of_meas”:" “,“val_tpl”:”{{value_json[‘RSSI’]}}“,“ic”:“mdi:information-outline”,“uniq_id”:“0BDDEE_status”,“device”:{“identifiers”:[“0BDDEE”],“connections”:[[“mac”,“60:01:94:0B:DD:EE”]],“name”:“Tasmota”,“model”:“Generic”,“sw_version”:“8.1.0(tasmota)”,“manufacturer”:“Tasmota”},”~":“tasmota/tele/”} (retained)
12:05:43 MQT: tasmota/tele/STATE = {“Time”:“2020-01-12T12:05:43”,“Uptime”:“0T01:26:12”,“UptimeSec”:5172,“Heap”:27,“SleepMode”:“Dynamic”,“Sleep”:50,“LoadAvg”:19,“MqttCount”:1,“Wifi”:{“AP”:1,“SSId”:“ZIWA”,“BSSId”:“B0:4E:26:F6:7D:4C”,“Channel”:10,“RSSI”:30,“Signal”:-85,“LinkCount”:1,“Downtime”:“0T00:00:06”}}
12:05:43 MQT: tasmota/tele/SENSOR = {“Time”:“2020-01-12T12:05:43”,“BME280”:{“Temperature”:28.8,“Humidity”:56.0,“Pressure”:853.2},“PressureUnit”:“hPa”,“TempUnit”:“C”}
12:06:04 MQT: tasmota/tele/HASS_STATE = {“Version”:“8.1.0(tasmota)”,“BuildDateTime”:“2019-12-25T12:33:25”,“Core”:“2_6_1”,“SDK”:“2.2.2-dev(38a443e)”,“Module”:“Generic”,“RestartReason”:“External System”,“Uptime”:“0T01:26:33”,“WiFi LinkCount”:1,“WiFi Downtime”:“0T00:00:06”,“MqttCount”:1,“BootCount”:30,“SaveCount”:52,“IPAddress”:“192.168.100.127”,“RSSI”:“30”,“LoadAvg”:19}
12:06:13 MQT: tasmota/tele/STATE = {“Time”:“2020-01-12T12:06:13”,“Uptime”:“0T01:26:42”,“UptimeSec”:5202,“Heap”:27,“SleepMode”:“Dynamic”,“Sleep”:50,“LoadAvg”:19,“MqttCount”:1,“Wifi”:{“AP”:1,“SSId”:“ZIWA”,“BSSId”:“B0:4E:26:F6:7D:4C”,“Channel”:10,“RSSI”:30,“Signal”:-85,“LinkCount”:1,“Downtime”:“0T00:00:06”}}
12:06:13 MQT: tasmota/tele/SENSOR = {“Time”:“2020-01-12T12:06:13”,“BME280”:{“Temperature”:28.8,“Humidity”:55.7,“Pressure”:853.1},“PressureUnit”:“hPa”,“TempUnit”:“C”}