Nextcloud version _(eg, 12.0.3)_: Operating system and version _(debian 9.1)_: Apache or nginx version _(2.4.25-3+deb9u4)_: PHP version _(eg, 7.0+49)_: The issue you are facing:
I am trying to integrate collabora online with my nextcloud 12 instance following the instructions at https://nextcloud.com/collaboraonline/
I noticed that despite the docker container of collab/code is running, docker logs shows lots of:
wsd-00027-00027 00:29:46.415744 [ loolwsd ] ERR Failed to bind to: IPv6 port: 32857 (errno: Bad file descriptor)| net/Socket.cpp:274
PS: The docker HOST has ipv6 disabled. I dont know why collab/code is blindly trying to bind to a ipv6 address.