Why isn't the Public IP address connecting to the Server?

I'm new to AWS and learning Terraform from the book Terraform Up and Running, and set up an EC2 Instance. I revised the code below based on prior posts in this forum and with the help of ChatGPT. "Terraform Apply" was successful. However, when I enter the Public IP Address in a browser or in the terminal of my MacBook, it's not connecting to the server after revising the code multiple times and many attempts. The Instance State is Running, it's listening on the correct port and the Security Group setting looks okay.

Any help would be appreciated. Here's my code:

terraform { required_providers { aws = { source = "hashicorp/aws" version = " 5.4.0" } } }

provider "aws" { region = "us-east-1" access_key = "xxxxx" secret_key = "xxxxx" }

resource "aws_instance" "ubuntu" { ami = "ami-0dd13bd6eb6a9effe" instance_type = "t4g.micro" vpc_security_group_ids= [aws_security_group.instance.id] subnet_id = "subnet-xxxxx"

user_data = <<-EOF #!/bin/bash echo "Hello, World" > index.html nohup busybox httpd -f -p 8080 & EOF

user_data_replace_on_change = true

tags = { Name = "ubuntu" } }

resource "aws_security_group" "instance" { name = "terraform-example-instance" vpc_id = "vpc-xxxxx"

ingress { from_port = 8080 to_port = 8080 protocol = "tcp" cidr_blocks = ["0.0.0.0/0"] }

ingress { from_port = 22 to_port = 22 protocol = "tcp" cidr_blocks = ["0.0.0.0/0"] }

egress { from_port = 0 to_port = 0 protocol = "-1" cidr_blocks = ["0.0.0.0/0"] } }

resource "aws_route_table" "main" { vpc_id = "vpc-xxxxx"

route { cidr_block = "0.0.0.0/0" gateway_id = "igw-xxxxxx" }

tags = { Name = "main" } }

resource "aws_route_table_association" "main" { subnet_id = "subnet-02630f93b67c2d350" route_table_id = aws_route_table.main.id }