Otherwise follow the normal upgrade procedure which will restart services as part of the upgrade process
If cb-nginx won't start, check the bottom of /var/log/cb/nginx/startup.log for errors:
Warning: There are additional changes that need to be made if you are using the multihome configuration for the first time. Please follow the additional steps provided here: Multihome Configuration Troubleshooting
Minions should use the default /etc/cb/nginx/conf.d/cb.conf configuration since the UI is accessed though the master.
If nginx doesn't start on the minions, rename the pre 5.2 multihome file: