Error in version 0.86.4 '<' not supported between instances of 'NoneType' and 'datetime.timedelta'

Hi, I get an error when checking config after updating to version 0.86.4. See transcript:

core-ssh:~# hassio ha check
Error: INFO:homeassistant.util.package:Attempting install of colorlog==4.0.2
Testing configuration at /config
ERROR:homeassistant.scripts.check_config:BURB
Traceback (most recent call last):
  File "/usr/local/lib/python3.6/site-packages/homeassistant/scripts/check_config.py", line 207, in check
    res['components'] = check_ha_config_file(hass)
  File "/usr/local/lib/python3.6/site-packages/homeassistant/scripts/check_config.py", line 377, in check_ha_config_file
    p_validated = platform.PLATFORM_SCHEMA(p_validated)
  File "/usr/local/lib/python3.6/site-packages/voluptuous/schema_builder.py", line 267, in __call__
    return self._compiled([], data)
  File "/usr/local/lib/python3.6/site-packages/voluptuous/schema_builder.py", line 589, in validate_dict
    return base_validate(path, iteritems(data), out)
  File "/usr/local/lib/python3.6/site-packages/voluptuous/schema_builder.py", line 381, in validate_mapping
    cval = cvalue(key_path, value)
  File "/usr/local/lib/python3.6/site-packages/voluptuous/schema_builder.py", line 589, in validate_dict
    return base_validate(path, iteritems(data), out)
  File "/usr/local/lib/python3.6/site-packages/voluptuous/schema_builder.py", line 381, in validate_mapping
    cval = cvalue(key_path, value)
  File "/usr/local/lib/python3.6/site-packages/voluptuous/schema_builder.py", line 811, in validate_callable
    return schema(data)
  File "/usr/local/lib/python3.6/site-packages/voluptuous/schema_builder.py", line 267, in __call__
    return self._compiled([], data)
  File "/usr/local/lib/python3.6/site-packages/voluptuous/schema_builder.py", line 589, in validate_dict
    return base_validate(path, iteritems(data), out)
  File "/usr/local/lib/python3.6/site-packages/voluptuous/schema_builder.py", line 381, in validate_mapping
    cval = cvalue(key_path, value)
  File "/usr/local/lib/python3.6/site-packages/voluptuous/validators.py", line 204, in _run
    return self._exec(self._compiled, value, path)
  File "/usr/local/lib/python3.6/site-packages/voluptuous/validators.py", line 249, in _exec
    return func(path, v)
  File "/usr/local/lib/python3.6/site-packages/voluptuous/schema_builder.py", line 811, in validate_callable
    return schema(data)
  File "/usr/local/lib/python3.6/site-packages/homeassistant/helpers/config_validation.py", line 327, in positive_timedelta
    if value < timedelta(0):
TypeError: '<' not supported between instances of 'NoneType' and 'datetime.timedelta'
Fatal error while loading config: '<' not supported between instances of 'NoneType' and 'datetime.timedelta'
Failed config
  General Errors:
    - '<' not supported between instances of 'NoneType' and 'datetime.timedelta'
Successful config (partial)

How can I solve this?