AWS CloudFormation

Someone to kindly help me in this template. I am trying to signal Cloudformation using cfn-signal on my instance with a logical id MyInstance. This is the error I am getting after trying to debug it all day.

AWSTemplateFormatVersion: 2010-09-09 Description: Creating an ec2 instance Parameters: ParamKeyName: Description: Select the key name from the list Type: AWS::EC2::KeyPair::KeyName ParamAZName: Description: Select the key name from the list Type: AWS::EC2::AvailabilityZone::Name ParamInstanceType:
Description: Select the Instance Type from the list Type: String Default: t3.small AllowedValues: - t2.micro - t3.small - t3.micro Resources: MySG: Type: AWS::EC2::SecurityGroup Properties: GroupDescription: Allow HTTP and SSH traffic GroupName: Dev SecurityGroup SecurityGroupIngress: - IpProtocol: tcp FromPort: 80 ToPort: '80' CidrIp: 0.0.0.0/0

    - IpProtocol: tcp
      FromPort: 22
      ToPort: 22
      CidrIp: 0.0.0.0/0

MyInstance: Type: AWS::EC2::Instance CreationPolicy: ResourceSignal: Timeout: PT10M Metadata: "AWS::CloudFormation::Init": configSets: setup: - myec2config myec2config: packages: yum: httpd: []

      files:
        "/var/www/html/index.html":
          content: |
            <h1>Hello from Restart</h1>
                    
          mode: "000755"
          owner: root
          group: root
        
      services:
        sysvinit:
          httpd:
            enabled: true
            ensureRunning: true
          

Properties: 
  ImageId: ami-093467ec28ae4fe03
  SecurityGroups:
    - !Ref MySG
  
  KeyName: !Ref ParamKeyName

  AvailabilityZone: !Ref ParamAZName
  InstanceType: !Ref ParamInstanceType
  Tags:
    - Key: Name
      Value: EC2 Instance
  UserData:
    'Fn::Base64': 
      !Sub |
        #!/bin/bash -xe
        yum update -y aws-cfn-bootstrap 
        /opt/aws/bin/cfn-init -v --stack ${AWS::StackId} --resource MyInstance --region ${AWS::Region} 
        /opt/aws/bin/cfn-signal -e $? --stack ${AWS::StackId} --resource MyInstance --region ${AWS::Region}

Outputs: OutputAppURL: Description: App URL Value: !Sub 'http://${MyInstance.PublicDnsName}'