Hi all, i have a problem and i hope you can help me. rancher 2.8.0 on ubuntu server 3 unx masters 4 windows nodes ----- all unx masters show in rancher "Error applying plan -- check rancher-system-agent.service logs on node for more information" in lens i see unx02 as not a voter member list : 76a84e6a59bc6ff, started, unx02-6a0bed36, https://10.0.2.49:2380, https://10.0.2.49:2379, false 28128482da03686e, started, unx01-435a41b1, https://10.0.2.48:2380, https://10.0.2.48:2379, false a11fc920d9fb1393, started, unx03-v2-e1c2189c, https://10.0.2.51:2380, https://10.0.2.51:2379, false journalctl -u rancher-system-agent.service -f -- Logs begin at Mon 2025-09-22 084718 EEST. -- Sep 25 112836 UNX01 rancher-system-agent[1983104]: time="2025-09-25T112836+03:00" level=error msg="[K8s] Maximum failure threshold exceeded for plan with checksum value of a79f040aa1c1bd815279757725899170469d636ee39e934d3768d15a957afff2, (failures: 3, threshold: 3)" Sep 25 112841 UNX01 rancher-system-agent[1983104]: time="2025-09-25T112841+03:00" level=error msg="[K8s] Maximum failure threshold exceeded for plan with checksum value of a79f040aa1c1bd815279757725899170469d636ee39e934d3768d15a957afff2, (failures: 3, threshold: 3)" also in conditions in rancher : ProvisionedUnknown1.1 hours ago[Waiting] waiting for [custom-1f08034c346e] certificate rotation UpdatedUnknown1.1 hours ago[Waiting] waiting for [custom-1f08034c346e] certificate rotation any idea ?

I think that's the problem on Rancher 2.8.0, just try to restart the master one by one, check the CM and what is the logs. If possible just upgrade the rancher to the 2.11.2 with upgrade path to 2.9 respectively to 2.11.2. I have this situation before. BTW, please check the cluster containerd, is there already the latest or not. You can check in CM of the cluster then Edit Config