Bug report

mitmproxy has crashed!
Please lodge a bug report at: https://github.com/mitmproxy/mitmproxy
Traceback (most recent call last):
File “e:\python37\lib\site-packages\mitmproxy\proxy\server.py”, line 121, in handle
root_layer()
TypeError: ‘NoneType’ object is not callable

Well, Is this how we lodge a bug report?