[solved/mitigated] Value cannot be processed as a number: off - <min:sec> helpers/condition.py (WARNING)

Hi.

After some edits in files (trying to get battery_low package to work and trying to get the built-in-broker to work (which fails, maybe (! still trying to find out) as it defaults to a port already in use in my config, trying to solve via port as mentioned in https://github.com/home-assistant/home-assistant/issues/3263 ), i see the following:

Value cannot be processed as a number: off
18:23 helpers/condition.py (WARNING)
Value cannot be processed as a number: off
18:20 helpers/condition.py (WARNING)
Value cannot be processed as a number: off
18:19 helpers/condition.py (WARNING)
Value cannot be processed as a number: off
18:18 helpers/condition.py (WARNING)
Value cannot be processed as a number: off
18:15 helpers/condition.py (WARNING)
Value cannot be processed as a number: off
18:14 helpers/condition.py (WARNING)

How can i find out what is causing this error? Would it be possible for devs to make this error include some info? I had a look at http://pydoc.net/hassmart-homeassistant/0.60.0/homeassistant.helpers.condition/ and wonder whether maybe an entityid could be returned in the warning?

(changed condition.py to return ‘entity’ instead of ‘value’, which makes me know what sensor causes the problem)