Cannot access plugin-addons - heroku

Question

Hey i have a problem with deploying an app, when i try to deploy he app i get this error
-----> Building on the Heroku-20 stack
-----> Using buildpack: heroku/nodejs
-----> Node.js app detected
-----> Creating runtime environment
NPM_CONFIG_LOGLEVEL=error
NODE_VERBOSE=false
NODE_ENV=production
NODE_MODULES_CACHE=true
-----> Installing binaries
engines.node (package.json): 14.x
engines.npm (package.json): unspecified (use default)
Resolving node version 14.x...
Downloading and installing node 14.16.0...
Using default npm version: 6.14.11
-----> Installing dependencies
Installing node modules
npm ERR! #heroku-cli/plugin-addons not accessible from heroku
npm ERR! A complete log of this run can be found in:
npm ERR! /tmp/npmcache.fHOrI/_logs/2021-03-24T14_04_47_335Z-debug.log
-----> Build failed
We're sorry this build is failing! You can troubleshoot common issues here:
https://devcenter.heroku.com/articles/troubleshooting-node-deploys
If you're stuck, please submit a ticket so we can help:
https://help.heroku.com/
Love,
Heroku
! Push rejected, failed to compile Node.js app.
! Push failed
Why can it not access plugins that the deploy is generating? in the node_module folder

Answer 1

I had a similar error, and I fixed it by running an npm install on the specific library I was missing. I would try reinstalling Heroku CLI, and then npm install again. If you're missing a specific package, then try reinstalling it.
For reference I had this error:
Installing dependencies
Installing node modules
npm ERR! ws not accessible from #heroku-cli/plugin-ci
And I fixed it by running npm install ws for the web sockets plugin.