How to resolve "Unable to download node 14.18.0" when deploying an Ember.js app to Heroku?

I encountered the error mentioned in the Title.

I have referred to a few relevant Heroku articles and tried their suggested changes including specifying the exact version of Node.js, Yarn, or npm that I'm using locally , but that still didn't work.

Here's the relevant sections extracted from my package.json:

  "engines": {
    "node": "14.18.0",
    "npm": "6.14.15",
    "yarn": "1.19.1"
  },
  "ember": {
    "edition": "octane"
  }

Here's the deployment log:

Enumerating objects: 1134, done.
Counting objects: 100% (1134/1134), done.
Delta compression using up to 4 threads
Compressing objects: 100% (1027/1027), done.
Writing objects: 100% (1134/1134), 309.32 KiB | 2.64 MiB/s, done.
Total 1134 (delta 581), reused 0 (delta 0), pack-reused 0
remote: Compressing source files... done.
remote: Building source:
remote:
remote: -----> Building on the Heroku-20 stack
remote: -----> Using buildpack: https://codon-buildpacks.s3.amazonaws.com/buildpacks/heroku/emberjs.tgz
remote: -----> emberjs app detected
remote: -----> Setting NPM_CONFIG_PRODUCTION to false to install ember-cli toolchain
remote: -----> Fetching buildpack heroku/nodejs-v98
remote: -----> Node.js detected
remote:
remote: -----> Creating runtime environment
remote:
remote:        NPM_CONFIG_PRODUCTION=false
remote:        NPM_CONFIG_LOGLEVEL=error
remote:        NODE_VERBOSE=false
remote:        NODE_ENV=production
remote:        NODE_MODULES_CACHE=true
remote:
remote: -----> Installing binaries
remote:        engines.node (package.json):  14.18.0
remote:        engines.npm (package.json):   6.14.15
remote:
remote:        Downloading and installing node 14.18.0...
remote:        Unable to download node 14.18.0; does it exist?
remote:
remote: -----> Build failed
remote:
remote:        We're sorry this build is failing! You can troubleshoot common issues here:
remote:        https://devcenter.heroku.com/articles/troubleshooting-node-deploys
remote:
remote:        If you're stuck, please submit a ticket so we can help:
remote:        https://help.heroku.com/
remote:
remote:        Love,
remote:        Heroku
remote:
remote: -----> Failed trying to compile heroku/nodejs-v98
remote:  !     Push rejected, failed to compile emberjs app.
remote:
remote:  !     Push failed
remote:  !
remote:  ! ## Warning - The same version of this code has already been built: d70a7009920574c3b615eb11c570a054b8348453
remote:  !
remote:  ! We have detected that you have triggered a build from source code with version d70a7009920574c3b615eb11c570a054b8348453
remote:  ! at least twice. One common cause of this behavior is attempting to deploy code from a different branch.
remote:  !
remote:  ! If you are developing on a branch and deploying via git you must run:
remote:  !
remote:  !     git push heroku <branchname>:main
remote:  !
remote:  ! This article goes into details on the behavior:
remote:  !   https://devcenter.heroku.com/articles/duplicate-build-version
remote:
remote: Verifying deploy...
remote:
remote: !   Push rejected to rarweo.
remote:
To https://git.heroku.com/rarweo.git
 ! [remote rejected] main -> main (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/rarweo.git'