If you experience issues connecting to services that was working before upgrade you might have to adjust your MTU size in the docker network. Examples of issues could be that you are unable to send email notifications or login using LDAP authentication.
Follow these instructions to set the MTU size
> unomaly stop
> docker network rm local
> docker network create --subnet=172.18.0.0/16 --opt com.docker.network.driver.mtu=1450 local
> unomaly restart
That will recreate the docker network called local with a MTU size of 1450.