push jar file to my java heroku app using CLI - heroku

Question

I am running a javascript app in heroku (scoold) and have been told by the developer that there is a new jar file to upload. I Downloaded the heroku cli and jar file and ran the following commands as instructed:
heroku plugins:install java
heroku deploy:jar scoold-x.y.z.jar --app myscooldapp
However, I am getting the following error:
C:\Sites>heroku deploy:jar scoold-pro-1.37.1.jar --app nocodeflow
Uploading scoold-pro-1.37.1.jar
events.js:187
throw er; // Unhandled 'error' event
^
Error: spawn java ENOENT
at Process.ChildProcess._handle.onexit (internal/child_process.js:264:19)
at onErrorNT (internal/child_process.js:456:16)
at processTicksAndRejections (internal/process/task_queues.js:80:21)
Emitted 'error' event on ChildProcess instance at:
at Process.ChildProcess._handle.onexit (internal/child_process.js:270:12)
at onErrorNT (internal/child_process.js:456:16)
at processTicksAndRejections (internal/process/task_queues.js:80:21) {
errno: 'ENOENT',
code: 'ENOENT',
syscall: 'spawn java',
path: 'java',
spawnargs: [
'-Dheroku.appName=nocodeflow',
'-Xmx1g',
'-Dheroku.jarFile=scoold-pro-1.37.1.jar',
'-Dheroku.jarOpts=',
'-cp',
'C:\\Users\\Artwe\\AppData\\Local\\heroku\\node_modules\\#heroku-cli\\plugin-java\\lib\\heroku-deploy-complete.jar',
'com.heroku.sdk.deploy.DeployJar'
]
}

Answer 1

I create a ticket on the Heroku support center, because I had the same problem.
I want to deploy a simple war and normally I don't need any Node.js ...