geneva: NetfilterQueue run_socket error

I’m running NetfilterQueue git version because I couldn’t get pip to install it but that shouldn’t matter I think. LOG:

##$ sudo python3 engine.py --server-port 80 --strategy "[TCP:flags:PA]-duplicate(tamper{IP:len:replace:64},)-|" --log debug

2020-01-25 04:13:35 DEBUG:[ENGINE] Engine created with strategy [TCP:flags:PA]-duplicate(tamper{TCP:dataofs:replace:10}(tamper{TCP:chksum:corrupt},),)-| \/ (ID xlez5tdl) to port 80
2020-01-25 04:13:35 DEBUG:[ENGINE] Configuring iptables rules
2020-01-25 04:13:35 DEBUG:[ENGINE] iptables -A OUTPUT -p tcp --dport 80 -j NFQUEUE --queue-num 1
2020-01-25 04:13:35 DEBUG:[ENGINE] iptables -A INPUT -p tcp --sport 80 -j NFQUEUE --queue-num 2
2020-01-25 04:13:35 DEBUG:[ENGINE] iptables -A OUTPUT -p udp --dport 80 -j NFQUEUE --queue-num 1
2020-01-25 04:13:35 DEBUG:[ENGINE] iptables -A INPUT -p udp --sport 80 -j NFQUEUE --queue-num 2
2020-01-25 04:13:36 DEBUG:[ENGINE] NFQueue Initialized after 0
2020-01-25 04:13:37 ERROR:[ENGINE] Exception out of run_nfqueue() (direction=in)
Traceback (most recent call last):
  File "engine.py", line 115, in run_nfqueue
    nfqueue.run_socket(nfqueue_socket)
SystemError: <method 'run_socket' of 'netfilterqueue.NetfilterQueue' objects> returned NULL without setting an error
2020-01-25 04:13:37 ERROR:[ENGINE] Exception out of run_nfqueue() (direction=out)
Traceback (most recent call last):
  File "engine.py", line 115, in run_nfqueue
    nfqueue.run_socket(nfqueue_socket)
SystemError: <method 'run_socket' of 'netfilterqueue.NetfilterQueue' objects> returned NULL without setting an error ```