EDIT : Following workaround is only for revoked version of Defender for Xperia 10 II. See this post for more details.
Is it possible that you applied last revoked Defender’s update? If you’re using this revoked version, it has a small typo error breaking stuff.
Last update added missed a comma. You have to change to following content :
lxc.mount.entry = /system/etc/hosts system/etc/hosts none bind,ro 0 0
In the file /var/lib/lxc/aliendalvik/extra_config
Save this content and restart you’re phone.