Now every certManager.clusterIssuers has to set .email in chart cert-manager.
A new kubeadm-configmap addon has been added, which is necessary for bringyourown clusters. In case that you are overriding the default addons list in your KubermaticConfiguration (userClusters.addons.kubernetes.defaultManifests), make sure to add kubeadm-configmap addon into the list. You can use kubermatic-installer print command to check the exact default addons list.