No devices appearing after installation + restart about eero_tracker HOT 7 CLOSED

2020-05-04 02:00:54 WARNING (MainThread) [homeassistant.loader] You are using a custom integration for eero_tracker which has not been tested by Home Assistant. This component might cause stability problems, be sure to disable it if you experience issues with Home Assistant.
2020-05-04 02:00:55 DEBUG (SyncWorker_5) [custom_components.eero_tracker.device_tracker] Initializing eero_tracker (domain device_tracker)
2020-05-04 02:00:55 DEBUG (zeroconf-ServiceBrowser__hap._tcp.local.) [homeassistant.components.zeroconf] Discovered new device Living Room eero Pro._hap._tcp.local. {'host': '192.168.7.1', 'port': <snip>, 'hostname': 'eero-<snip:mac-address>.local.', 'type': '_hap._tcp.local.', 'name': 'Living Room eero Pro._hap._tcp.local.', 'properties': {'_raw': {'c#': b'12', 'ff': b'2', 'id': b'<snip:mac-address>', 'md': b'eero Pro', 'pv': b'1.1', 's#': b'1', 'sf': b'1', 'ci': b'33', 'sh': b'<snip>'}, 'c#': '12', 'ff': '2', 'id': '<snip:mac-address>', 'md': 'eero Pro', 'pv': '1.1', 's#': '1', 'sf': '1', 'ci': '33', 'sh': '<snip>'}}
2020-05-04 02:00:55 ERROR (MainThread) [homeassistant.components.device_tracker] Error setting up platform legacy
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/device_tracker/setup.py", line 64, in async_setup_legacy
    self.platform.get_scanner, hass, {DOMAIN: self.config}
  File "/usr/local/lib/python3.7/concurrent/futures/thread.py", line 57, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/config/custom_components/eero_tracker/device_tracker.py", line 43, in get_scanner
    return EeroDeviceScanner(hass, config[DOMAIN])
  File "/config/custom_components/eero_tracker/device_tracker.py", line 75, in __init__
    self.__scan_interval, MINIMUM_SCAN_INTERVAL, MINIMUM_SCAN_INTERVAL)
  File "/usr/local/lib/python3.7/logging/__init__.py", line 1407, in error
    self._log(ERROR, msg, args, **kwargs)
  File "/usr/local/lib/python3.7/logging/__init__.py", line 1514, in _log
    self.handle(record)
  File "/usr/local/lib/python3.7/logging/__init__.py", line 1524, in handle
    self.callHandlers(record)
  File "/usr/local/lib/python3.7/logging/__init__.py", line 1586, in callHandlers
    hdlr.handle(record)
  File "/usr/local/lib/python3.7/logging/__init__.py", line 894, in handle
    self.emit(record)
  File "/usr/src/homeassistant/homeassistant/components/system_log/__init__.py", line 181, in emit
    record, stack, _figure_out_source(record, stack, self.hass)
  File "/usr/src/homeassistant/homeassistant/components/system_log/__init__.py", line 97, in __init__
    self.message = deque([record.getMessage()], maxlen=5)
  File "/usr/local/lib/python3.7/logging/__init__.py", line 369, in getMessage
    msg = msg % self.args
TypeError: %d format: a number is required, not datetime.timedelta