Some Errors after Update / even on new installation

Hello,
first thanks for your effeort.
i have some problems to update my omv 3.0 to 4.0
1. while upgrading i get several errors.

Restarting engine daemon ...
Exception ignored in: <function WeakValueDictionary.__init__.<locals>.remove at 0x7ff310bf9730>
Traceback (most recent call last):
File "/usr/lib/python3.5/weakref.py", line 117, in remove
TypeError: 'NoneType' object is not callable
Exception ignored in: <function WeakValueDictionary.__init__.<locals>.remove at 0x7ff310bf9730>
Traceback (most recent call last):
File "/usr/lib/python3.5/weakref.py", line 117, in remove
TypeError: 'NoneType' object is not callable

I don't get the whole upgrade log because there was not enough buffer in putty.

2. i get a network problem on start - i want to fix it without setting the timeout down:

Boot Log attached:
boot.txt

Edit: Fix Problem 1:
cd /usr/lib/python3.5
nano weakref.py
zeile 109 def remove(wr, selfref=ref(self)): entfernen und mit def remove(wr, selfref=ref(self), _atomic_removal=_remove_dead_weakref): ersetzen
zeile 117 _remove_dead_weakref(d, wr.key) entfernen und mit _atomic_removal(d, wr.key) ersetzen
danach reboot

(thanks horschte)