Version 18 cannot connect to etcd 3.6, error: etcdserver: permission denied. Could this be due to version incompatibility?

[brantxs]

Expected behavior:

Current behavior:

Bug details:

• Teleport version 18.1.8
• Recreation steps
• Debug logs

[webvictim]

We need more information to investigate. Please provide:

• your /etc/teleport.yaml config file from your Teleport auth service
• details on your etcd config/deployment
• Full logs at DEBUG level from the Teleport auth service when starting up the process

[brantxs]

auth_service:
enabled: "yes"
cluster_name: hwgz-cluster
listen_addr: 0.0.0.0:3025
proxy_listener_mode: multiplex
tokens:
- "proxy:9999999f3d2a0b06349376ebb52d02e8"

etcd config:
client-transport-security:
cert-file: "/opt/etcd/etcd-gz194.crt"
key-file: "/opt/etcd/etcd-gz194.key"
client-cert-auth: true
trusted-ca-file: "/opt/etcd/ca.crt"

debug log:

ERROR REPORT:
Original Error: rpctypes.EtcdError etcdserver: permission denied
Stack Trace:
github.com/gravitational/teleport/lib/backend/etcdbk/etcd.go:335 github.com/gravitational/teleport/lib/backend/etcdbk.(*EtcdBackend).checkVersion.func1
runtime/asm_amd64.s:1700 runtime.goexit
User Message: initialization failed
etcdserver: permission denied

[brantxs]

The connection to version 3.5 worked fine before.