Kotless Hello World example fails deploying on AWS

I am experiencing issues when trying to deploy the "Hello World" example for Kotless. I'm using the latest version of Kotless `0.1.7-beta-4`.
```
> Task :deploy

data.aws_iam_policy_document.kotless_static_assume: Refreshing state...
data.aws_caller_identity.current: Refreshing state...
data.aws_region.current: Refreshing state...
aws_api_gateway_rest_api.karti4ko: Refreshing state... [id=a9aty1vil1]
data.aws_s3_bucket.kotless_bucket: Refreshing state...
data.aws_iam_policy_document.kotless_static_policy: Refreshing state...
aws_api_gateway_deployment.root: Creating...
aws_iam_role.kotless_static_role: Creating...

Error: Error creating API Gateway Deployment: BadRequestException: The REST API doesn't contain any methods

on karti4ko.tf line 14, in resource "aws_api_gateway_deployment" "root":
14: resource "aws_api_gateway_deployment" "root" {

Error: Error creating IAM Role kotless-static-role: EntityAlreadyExists: Role with name kotless-static-role already exists.
status code: 409, request id: 8b6b2879-29be-4cfe-8028-f585f3ec1ece

on karti4ko.tf line 31, in resource "aws_iam_role" "kotless_static_role":
31: resource "aws_iam_role" "kotless_static_role" {

BUILD SUCCESSFUL in 47s
6 actionable tasks: 2 executed, 4 up-to-date
22:47:36: Task execution finished 'deploy'.
```

I have 1 file, `Functions.kt`, containing the following:
```kotlin
package com.serverless.karti4ko

import io.kotless.dsl.lang.http.Get

@Get("/")
fun sayHello() = "Say Hello!"
```

My `build.gradle.kts` looks like this

```kotlin
import io.kotless.plugin.gradle.dsl.kotless

group = "com.serverless.karti4ko"
version = "1.0-SNAPSHOT"

plugins {
kotlin("jvm") version "1.3.72" apply true
id("io.kotless") version "0.1.7-beta-4" apply true
}

repositories {
jcenter()
}

dependencies {
implementation("io.kotless", "kotless-lang", "0.1.7-beta-4")
}

kotless {
config {
bucket = "my.serverless.bucket"

terraform {
profile = "my.kotless.user"
region = "eu-west-1"
}
}
webapp {
lambda {
kotless {
packages = setOf("com.serverless.karti4ko")
}
}
}
}
```
### Expected events

1. Gradle deployment task should not be successful when the deployment is unsuccessful.
2. The "Hello World" example as given on the README for Kotless should deploy successfully.