Instance reachability check failed on ec2 ubunut 18.04

Ec2 instance : ubuntu 18.04-amd64-server-20210224 Not able to connect or bring up the ec2 instance which is failing in status checks. Instance status check : Instance reachability check failed On system error log : Failed to start Service for snap apâ¦amazon-ssm-agent.amazon-ssm-agent.