able to upgrade rancher version from v2.6.3 to v2.7.9, and latest version is showing on rancher UI as well but after sometime rancher UI is not working.
cattle-system pods are up and running but in the logs getting below error like
policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+
cluster.x-k8s.io/v1alpha3 MachineDeployment is deprecated; use cluster.x-k8s.io/v1beta1 MachineDeployment