TP-Link problem

Hi,
I still have problem with TP-link device tracker.
Log entry:

2017-07-25 18:50:46 ERROR (MainThread) [homeassistant.components.device_tracker] Error setting up platform tplink
Traceback (most recent call last):
File “/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/requests/packages/urllib3/response.py”, line 302, in _error_catcher
yield
File “/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/requests/packages/urllib3/response.py”, line 384, in read
data = self._fp.read(amt)
File “/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/http/client.py”, line 449, in read
n = self.readinto(b)
File “/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/http/client.py”, line 493, in readinto
n = self.fp.readinto(b)
File “/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/socket.py”, line 586, in readinto
return self._sock.recv_into(b)
ConnectionResetError: [Errno 54] Connection reset by peer

Any thought?
Regards
Robert