Errors on startup - why? And how to to debug?

I get three errors on startup but I am using Hassio so have no idea how to go about debugging. None of them seem to affect my system so I am wondering if it is sequential timing issue which just resolves itself later but they are a bit irritating! Can anyone help?

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Log Details (ERROR)

Wed Apr 11 2018 12:02:46 GMT+0100 (GMT Summer Time)

Error executing service <ServiceCall homeassistant.turn_on: entity_id=>

Traceback (most recent call last):
File “/usr/lib/python3.6/site-packages/homeassistant/core.py”, line 1002, in _event_to_service_call
await service_handler.func(service_call)
File “/usr/lib/python3.6/site-packages/homeassistant/components/init.py”, line 117, in async_handle_turn_service
entity_ids = extract_entity_ids(hass, service)
File “/usr/lib/python3.6/site-packages/homeassistant/helpers/service.py”, line 103, in extract_entity_ids
return group.expand_entity_ids(hass, [service_ent_id])
File “/usr/lib/python3.6/site-packages/homeassistant/components/group/init.py”, line 204, in expand_entity_ids
domain, _ = ha.split_entity_id(entity_id)
ValueError: not enough values to unpack (expected 2, got 1)

Log Details (ERROR)

Wed Apr 11 2018 12:02:56 GMT+0100 (GMT Summer Time)

Error doing job: Task was destroyed but it is pending!

Log Details (ERROR)

Wed Apr 11 2018 12:02:56 GMT+0100 (GMT Summer Time)

Error executing service <ServiceCall homeassistant.turn_on: entity_id=>

Traceback (most recent call last):
File “/usr/lib/python3.6/site-packages/homeassistant/core.py”, line 1002, in _event_to_service_call
await service_handler.func(service_call)
File “/usr/lib/python3.6/site-packages/homeassistant/components/init.py”, line 117, in async_handle_turn_service
entity_ids = extract_entity_ids(hass, service)
File “/usr/lib/python3.6/site-packages/homeassistant/helpers/service.py”, line 103, in extract_entity_ids
return group.expand_entity_ids(hass, [service_ent_id])
File “/usr/lib/python3.6/site-packages/homeassistant/components/group/init.py”, line 204, in expand_entity_ids
domain, _ = ha.split_entity_id(entity_id)
ValueError: not enough values to unpack (expected 2, got 1)