Failed to receive 1 resource signal(s) within the specified duration

All resources are being created but EC2Instance is failing to CREATE_COMPLETE.
I suspect something is a miss in in userdata and it is failing to send cfn-signal.

Looking at syslogs, here are some notable errors:

`Aug 25 17:14:51 ip-172-31-23-99 amazon-ssm-agent.amazon-ssm-agent[1138]: Error occurred fetching the seelog config file path: open /etc/amazon/ssm/seelog.xml: no such file or directory`
`Aug 25 17:14:51 ip-172-31-23-99 amazon-ssm-agent.amazon-ssm-agent[1138]: 2024-08-25 17:14:51 WARN Error adding the directory '/etc/amazon/ssm' to watcher: no such file or directory`
`Aug 25 17:14:54 ip-172-31-23-99 amazon-ssm-agent.amazon-ssm-agent[1138]: 2024-08-25 17:14:52 WARN EC2RoleProvider Failed to connect to Systems Manager with instance profile role credentials. Err: retrieved credentials failed to report to ssm. RequestId: 14310a44-fbee-4b1a-916c-bb8f4bbc7f78 Error: AccessDeniedException: User: arn:aws:sts::861979030611:assumed-role/MailInABoxInstanceRole/i-0377f7c10d3bd0dbd is not authorized to perform: ssm:UpdateInstanceInformation on resource: arn:aws:ec2:eu-west-1:861979030611:instance/i-0377f7c10d3bd0dbd because no identity-based policy allows the ssm:UpdateInstanceInformation action`
```
Aug 25 17:14:54 ip-172-31-23-99 amazon-ssm-agent.amazon-ssm-agent[1138]: 2024-08-25 17:14:52 ERROR EC2RoleProvider Failed to connect to Systems Manager with SSM role credentials. error calling RequestManagedInstanceRoleToken: AccessDeniedException: Systems Manager's instance management role is not configured for account: 861979030611
Aug 25 17:14:54 ip-172-31-23-99 amazon-ssm-agent.amazon-ssm-agent[1138]: 2024-08-25 17:14:52 ERROR [CredentialRefresher] Retrieve credentials produced error: no valid credentials could be retrieved for ec2 identity. Default Host Management Err: error calling RequestManagedInstanceRoleToken: AccessDeniedException: Systems Manager's instance management role is not configured for account: 861979030611
```
`Aug 25 17:24:41 box postfix/submission/smtpd[38450]: SSL_accept error from [ec2-54-220-97-61.eu-west-1.compute.amazonaws.com](http://ec2-54-220-97-61.eu-west-1.compute.amazonaws.com/)[54.220.97.61]: lost connection`

Posting if someone has better idea of whats the issue. Will try on my end to work it out.