Custom Components Busch Jäger free@home freeathome Error

I use the app from jheling GitHub to integrate Busch Jäger components from the free@home series. Unfortunately, the integration creates massive problems when rebooting Hass.io on a Raspberry PI. The UI is no longer accessible after the reboot. It only works again if the “freeathome” folder is deleted from “customer_components” and copied back after successful reboots.
Here is the log file after the problem. Who knows a solution to the problem?

2020-02-12 21:02:51 WARNING (MainThread) [homeassistant.loader] You are using a custom integration for freeathome which has not been tested by Home Assistant. This component might cause stability problems, be sure to disable it if you do experience issues with Home Assistant.
2020-02-12 21:03:02 WARNING (MainThread) [slixmpp.stringprep] Using slower stringprep, consider compiling the faster cython/libidn one.
2020-02-12 21:03:04 ERROR (MainThread) [homeassistant.core] Error doing job: Fatal error: protocol.data_received() call failed.
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/asyncio/selector_events.py", line 826, in _read_ready__data_received
    self._protocol.data_received(data)
  File "/usr/local/lib/python3.7/site-packages/slixmpp/xmlstream/xmlstream.py", line 406, in data_received
    self._spawn_event(xml)
  File "/usr/local/lib/python3.7/site-packages/slixmpp/xmlstream/xmlstream.py", line 970, in _spawn_event
    stanza = self._build_stanza(xml)
  File "/usr/local/lib/python3.7/site-packages/slixmpp/xmlstream/xmlstream.py", line 951, in _build_stanza
    stanza = stanza_type(self, xml)
  File "/usr/local/lib/python3.7/site-packages/slixmpp/xmlstream/stanzabase.py", line 1390, in __init__
    ElementBase.__init__(self, xml, parent)
  File "/usr/local/lib/python3.7/site-packages/slixmpp/xmlstream/stanzabase.py", line 416, in __init__
    if self.setup(xml):
  File "/usr/local/lib/python3.7/site-packages/slixmpp/stanza/stream_features.py", line 27, in setup
    self.values = self.values
  File "/usr/local/lib/python3.7/site-packages/slixmpp/xmlstream/stanzabase.py", line 615, in _set_stanza_values
    self[full_interface] = value
  File "/usr/local/lib/python3.7/site-packages/slixmpp/xmlstream/stanzabase.py", line 753, in __setitem__
    lang=lang)
  File "/usr/local/lib/python3.7/site-packages/slixmpp/xmlstream/stanzabase.py", line 959, in _set_sub_text
    return self._del_sub(name, lang=lang)
  File "/usr/local/lib/python3.7/site-packages/slixmpp/xmlstream/stanzabase.py", line 1040, in _del_sub
    parent = self.xml.find(parent_path)
  File "/usr/local/lib/python3.7/xml/etree/ElementTree.py", line 299, in find
    return ElementPath.find(self, path, namespaces)
  File "/usr/local/lib/python3.7/xml/etree/ElementPath.py", line 307, in find
    return next(iterfind(elem, path, namespaces), None)
TypeError: 'NoneType' object is not an iterator
2020-02-12 21:03:12 WARNING (MainThread) [homeassistant.setup] Setup of freeathome is taking over 10 seconds.