Ошибка:

sysctl: cannot stat /proc/sys/net/bridge/bridge-nf-call-iptables: No such file or directory
sysctl: cannot stat /proc/sys/net/bridge/bridge-nf-call-ip6tables: No such file or directory

Исправляем:

modprobe br_netfilter
lsmod |grep  br_netfilter

получим вывод:
br_netfilter           20480  0
bridge                110592  1 br_netfilter