variables.tf

variable "aws_region" {
  description = "AWS region where EC2 instance will be created"
  type = string
}

variable "instance_type" {
  description = "EC2 instance type"
  type = string
}

variable "ami_id" {
  description = "AMI ID for the EC2 instance"
  type = string
}

firsttest.tf

provider "aws" {
    region = var.aws_region
}

resource "aws_instance" "test" {
    ami = var.ami_id
    instance_type = var.instance_type
}

terraform.tfvars

aws_region = "eu-north-1"
ami_id = "ami-07c8c1b18ca66bb07"
instance_type = "t3.micro"

the error i got when run terraform apply -auto-approve

terrform version:

Terraform v1.9.1

on windows_amd64

provider registry.terraform.io/hashicorp/aws v5.58.0