How to resolve such errors when installing BEM project-stub?

Question

macOS

I'm trying to start learning BEM with this tutorial . After the repository is cloned from the github, I enter npm install to install the dependencies and endure the fail. Here is the process listing:

bimbatron:bem bimba$ npm install

> [email protected] postinstall /Users/bimba/BEM
> npm run deps


> [email protected] deps /Users/bimba/BEM
> bower i --allow-root

bower EACCES        EACCES: permission denied, mkdir '/Users/bimba/.cache/bower/registry/bower.herokuapp.com'

Stack trace:
Error: EACCES: permission denied, mkdir '/Users/bimba/.cache/bower/registry/bower.herokuapp.com'
    at Error (native)
    at Object.fs.mkdirSync (fs.js:922:18)
    at sync (/Users/bimba/BEM/node_modules/bower/lib/node_modules/bower-registry-client/node_modules/mkdirp/index.js:55:12)
    at Function.sync (/Users/bimba/BEM/node_modules/bower/lib/node_modules/bower-registry-client/node_modules/mkdirp/index.js:61:24)
    at new Cache (/Users/bimba/BEM/node_modules/bower/lib/node_modules/bower-registry-client/lib/util/Cache.js:21:16)
    at RegistryClient.<anonymous> (/Users/bimba/BEM/node_modules/bower/lib/node_modules/bower-registry-client/lib/lookup.js:162:35)
    at Array.forEach (native)
    at RegistryClient.initCache (/Users/bimba/BEM/node_modules/bower/lib/node_modules/bower-registry-client/lib/lookup.js:149:34)
    at RegistryClient._initCache (/Users/bimba/BEM/node_modules/bower/lib/node_modules/bower-registry-client/Client.js:65:27)
    at new RegistryClient (/Users/bimba/BEM/node_modules/bower/lib/node_modules/bower-registry-client/Client.js:19:10)

Console trace:
Error
    at StandardRenderer.error (/Users/bimba/BEM/node_modules/bower/lib/renderers/StandardRenderer.js:81:37)
    at Logger.<anonymous> (/Users/bimba/BEM/node_modules/bower/lib/bin/bower.js:110:26)
    at emitOne (events.js:96:13)
    at Logger.emit (events.js:188:7)
    at Logger.emit (/Users/bimba/BEM/node_modules/bower/lib/node_modules/bower-logger/lib/Logger.js:29:39)
    at /Users/bimba/BEM/node_modules/bower/lib/commands/index.js:48:20
    at _rejected (/Users/bimba/BEM/node_modules/bower/lib/node_modules/q/q.js:844:24)
    at /Users/bimba/BEM/node_modules/bower/lib/node_modules/q/q.js:870:30
    at Promise.when (/Users/bimba/BEM/node_modules/bower/lib/node_modules/q/q.js:1122:31)
    at Promise.promise.promiseDispatch (/Users/bimba/BEM/node_modules/bower/lib/node_modules/q/q.js:788:41)
System info:
Bower version: 1.7.9
Node version: 6.9.1
OS: Darwin 15.6.0 x64

npm ERR! Darwin 15.6.0
npm ERR! argv "/Users/bimba/.nvm/versions/node/v6.9.1/bin/node" "/Users/bimba/.nvm/versions/node/v6.9.1/bin/npm" "run" "deps"
npm ERR! node v6.9.1
npm ERR! npm  v3.10.8
npm ERR! code ELIFECYCLE
npm ERR! [email protected] deps: `bower i --allow-root`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] deps script 'bower i --allow-root'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the bem-project-stub package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     bower i --allow-root
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs bem-project-stub
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls bem-project-stub
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /Users/bimba/BEM/npm-debug.log

npm ERR! Darwin 15.6.0
npm ERR! argv "/Users/bimba/.nvm/versions/node/v6.9.1/bin/node" "/Users/bimba/.nvm/versions/node/v6.9.1/bin/npm" "install"
npm ERR! node v6.9.1
npm ERR! npm  v3.10.8
npm ERR! code ELIFECYCLE
npm ERR! [email protected] postinstall: `npm run deps`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] postinstall script 'npm run deps'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the bem-project-stub package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     npm run deps
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs bem-project-stub
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls bem-project-stub
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /Users/bimba/BEM/npm-debug.log

The first mistake that catches your eye is some path that mentions the heroku app. I tried clearing bower's cache, but it doesn't help, the error reappears (by the way, how do I remove heroku completely from the system?).
What follows is information that doesn't tell me much. What is my problem?

Answer 1

The problem was solved by changing the owner of the problematic directories. They were owned by root.