How to properly set AWSElastic Beanstalk default template to Grails (Gradle) project?

New to DevOps so bare with me...

I am trying to setup up a continuous delivery structure for a Grails web-app with AWS using Jenkins. Jenkins is running on an AWS EC2 instance, its pipeline is build from a Jenkinsfile from the Git repo.

I am getting an error message on the deployment stage of the Jenkins pipeline:

+ ./gradlew :web-sandbox:deployTest
:web-sandbox:deployTest FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':web-sandbox:deployTest'.
> No Configuration Template named 'project/default' found. (Service: AWSElasticBeanstalk; Status Code: 400; Error Code: InvalidParameterValue; Request ID: 62838836-cf2c-46b9-a9e1-cd82f9ac2cfb)

Is the AWSElasticBeanstalk template mentioned here the YAML config file used to launch a new environment or is it something else?

I have been searching for a way to generate a config file for a Tomcat server with my build. That seems to be possible with the EB CLI. I have yet to find a way to do so.

Are there more efficient ways of generating a AWSElasticBeanstalk template in a Gradle project?

Here is my Jenkinsfile used to create a pipeline:

#!groovy

node{

stage('checkout'){
    checkout scm
}

stage('check tools'){
    sh "ls"
    sh "pwd"
    sh "./gradlew --version"
}

stage('clean'){
    sh "./gradlew clean"
}

stage('test'){
    sh "./gradlew :web-sandbox:test"
}

stage('packaging'){
    sh "./gradlew :web-sandbox:war"
}

stage('deploying'){
    sh "./gradlew :web-sandbox:deployTest"
}

}

And my gradle.build file of the web-app:

buildscript {
    repositories {
        mavenLocal()
        maven { url "https://repo.grails.org/grails/core" }
    }
    dependencies {
        classpath "org.grails:grails-gradle-plugin:$grailsVersion"
        classpath "org.grails.plugins:hibernate5:${gormVersion-".RELEASE"}"
        classpath "com.bertramlabs.plugins:asset-pipeline-gradle:2.15.1"
    }
}

plugins {
    id "fi.evident.beanstalk" version "0.2.2"
}

version "0.4"
group "web.sandbox"

apply plugin:"eclipse"
apply plugin:"idea"
apply plugin:"war"
apply plugin:"org.grails.grails-web"
apply plugin:"asset-pipeline"
apply plugin:"org.grails.grails-gsp"

repositories {
    mavenLocal()
    maven { url "https://repo.grails.org/grails/core" }
}

dependencies {
    compile project(":mod-sandbox")
    compile "org.springframework.boot:spring-boot-starter-logging"
    compile "org.springframework.boot:spring-boot-autoconfigure"
    compile "org.grails:grails-core"
    compile "org.springframework.boot:spring-boot-starter-actuator"
    compile "org.springframework.boot:spring-boot-starter-tomcat"
    compile "org.grails:grails-web-boot"
    compile "org.grails:grails-logging"
    compile "org.grails:grails-plugin-rest"
    compile "org.grails:grails-plugin-databinding"
    compile "org.grails:grails-plugin-i18n"
    compile "org.grails:grails-plugin-services"
    compile "org.grails:grails-plugin-url-mappings"
    compile "org.grails:grails-plugin-interceptors"
    compile "org.grails.plugins:cache"
    compile "org.grails.plugins:async"
    compile "org.grails.plugins:scaffolding"
    compile "org.grails.plugins:events"
    compile "org.grails.plugins:hibernate5"
    compile "org.hibernate:hibernate-core:5.1.16.Final"
    compile "org.grails.plugins:gsp"
    console "org.grails:grails-console"
    profile "org.grails.profiles:web"
    runtime "org.glassfish.web:el-impl:2.1.2-b03"
    runtime "com.h2database:h2"
    runtime "org.apache.tomcat:tomcat-jdbc"
    runtime "com.bertramlabs.plugins:asset-pipeline-grails:2.15.1"
    testCompile "org.grails:grails-gorm-testing-support"
    testCompile "org.grails.plugins:geb"
    testCompile "org.grails:grails-web-testing-support"
    testCompile "org.grails.plugins:geb:1.1.2"
    testRuntime "org.seleniumhq.selenium:selenium-htmlunit-driver:2.47.1"
    testRuntime "net.sourceforge.htmlunit:htmlunit:2.18"
    testRuntime "org.seleniumhq.selenium:selenium-chrome-driver:2.47.1"
}

bootRun {
    jvmArgs('-Dspring.output.ansi.enabled=always')
    addResources = true
    String springProfilesActive = 'spring.profiles.active'
    systemProperty springProfilesActive, System.getProperty(springProfilesActive)
}

tasks.withType(Test) {
    systemProperty "geb.env", System.getProperty('geb.env')
    systemProperty "geb.build.reportsDir", reporting.file("geb/integrationTest")
    systemProperty "webdriver.chrome.driver", System.getProperty('webdriver.chrome.driver')
    systemProperty "webdriver.gecko.driver", System.getProperty('webdriver.gecko.driver')
}

assets {
    minifyJs = true
    minifyCss = true
}

beanstalk {
    s3Endpoint = "s3-eu-west-2.amazonaws.com"
    beanstalkEndpoint = "elasticbeanstalk.eu-west-2.amazonaws.com"

    deployments {
        // Example to deploy to the same env
        test {
            file = "build/libs/web-sandbox-${version}.war"
            application = 'project'
            environment = 'Project-env'
            template = 'default'
        }

    }
}

Open to any tips or tricks for debugging AWS deployment issues with Gradle

Let me know if you need any additional information.