Help me debug "Fail-no-op: No files were affected in the upload process" when uploading to artifactory

I have a pipeline that compiles a pom.xml, generates a jar file and uploads it to my local artifactory.

When I try to upload the jar file to artifactory using rtUpload() I am getting this error even though the file exists in my workspace (the build is succssfull and in my workspace the jar is generated).

This is how I have configure my jenkins script:

pipeline {
agent any

environment {
    VERSION = "${env.BUILD_NUMBER}"
    PROJECT_REPO = '****'
    POM_DIR = 'pom.xml'
}

stages {
            stage('Artifactory Configuration') {
        steps {
            rtServer(
                id: 'central',
                url: '***',
                credentialsId: 'jfrog'
            )
        }
            }

    stage('Clone') {
        steps {
            git(
      url: PROJECT_REPO,
      credentialsId: 'git',
      branch: 'master'
  )
        }
    }

    stage('Build') {
        
            steps{
            script {
                
                pom = readMavenPom file: 'pom.xml'
                env.PROJECT_NAME = pom.artifactId
                sh 'mvn -B -DskipTests clean package'
                sh "sed 's/REPLACE_VERSION_HERE/${env.VERSION}/g' upload-pom.xml > upload-pom-${env.VERSION}.xml"
                echo "$WORKSPACE"
                echo "${env.PROJECT_NAME}"
                // zip zipFile: "${env.PROJECT_NAME}-${env.VERSION}-distribution.zip", archive: true, dir: 'dist'
            }
            }
        }
    
    stage('Upload Artifactory') {
        steps {
            rtUpload(
    serverId: 'central',
    
    
        spec: '''{
      "files": [
        {
          "pattern": "$WORKSPACE/target/JavaLibraryKoarioMaven-1.2-SNAPSHOT.jar",
          "target": "koariomaven/com/koario/fr/JavaLibraryKoarioMaven/${env.VERSION}/"
        }
      ]
}''',


    failNoOp: true,
)
        }
    }
}

post {
        always {
            emailext body: "${currentBuild.currentResult}: Job ${env.JOB_NAME} build ${env.BUILD_NUMBER}\n More info at: ${env.BUILD_URL}",
            recipientProviders: [[$class: 'DevelopersRecipientProvider'], [$class: 'RequesterRecipientProvider']],
            subject: "Jenkins Build ${currentBuild.currentResult}: Job ${env.JOB_NAME}"
        }
}

}

Here are my build logs:

[INFO] Building jar: /var/lib/jenkins/workspace/Java Library Koario (Maven Pipeline)/target/JavaLibraryKoarioMaven-1.2-SNAPSHOT.jar
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  5.521 s
[INFO] Finished at: 2022-11-24T17:07:24+01:00
[INFO] ------------------------------------------------------------------------
[Pipeline] sh
[Pipeline] }
[Pipeline] // script
[Pipeline] }
[Pipeline] // stage
[Pipeline] stage
[Pipeline] { (Upload Artifactory)
[Pipeline] rtUpload
Executing command: /bin/sh -c git log --pretty=format:%s -1
[Pipeline] }
[Pipeline] // stage
[Pipeline] stage
[Pipeline] { (Declarative: Post Actions)
[Pipeline] emailext
An attempt to send an e-mail to empty list of recipients, ignored.
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // withEnv
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
java.lang.RuntimeException: Fail-no-op: No files were affected in the upload process.
	at org.jfrog.hudson.pipeline.common.executors.GenericUploadExecutor.execute(GenericUploadExecutor.java:59)
	at org.jfrog.hudson.pipeline.declarative.steps.generic.UploadStep$Execution.runStep(UploadStep.java:39)
	at org.jfrog.hudson.pipeline.declarative.steps.generic.UploadStep$Execution.runStep(UploadStep.java:24)
	at org.jfrog.hudson.pipeline.ArtifactorySynchronousNonBlockingStepExecution.run(ArtifactorySynchronousNonBlockingStepExecution.java:55)
	at org.jenkinsci.plugins.workflow.steps.SynchronousNonBlockingStepExecution.lambda$start$0(SynchronousNonBlockingStepExecution.java:47)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:829)
/var/lib/jenkins/workspace/Java Library Koario (Maven Pipeline)@tmp/jfrog/69/.jfrog deleted
Finished: FAILURE

Thank you in advance.