Kubeadm dns issue

After installing kubeadm init ,
coredns is going to CrashLoopBackOff ,

kubeadm join whenever I run , core dns is going to crash.
please suggest

Kudeadm followed steps as below

docker versoin 18.9

what version of kubeadm is it and why is it in a crash loop backoff? can you see what’s happening when you describe the pod and look at the events?