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Some of the globally installed npm packages are not working

I have npm installed globally and whenever I run npm -v to check its version, it displays it correctly which is currently 7.13.0.
I also have heroku-cli installed globally but whenever I run heroku --version it says:
C:\Users\MyName\AppData\Roaming\npm/node_modules/node/bin/node: line 1: This: command not found
Inside C:\Users\MyName\AppData\Roaming\npm I have heroku and npm both installed globally but whenever I run a heroku command it fails to run. I am unable to figure out the issue.
Below I have attached the screenshot of my globally installed packages directory.

Maybe your npm's directory path configuration might have some error.
You can modify path by following steps.
Open or create a ~/.profile file and add your npm path
export PATH=C:\Users\MyName\AppData\Roaming\npm/node_modules/node/bin
On the command line, update your system variables:
source ~/.profile
Or else, I recommend changing the npm's default directory which is explained on npm official docs.(https://docs.npmjs.com/resolving-eacces-permissions-errors-when-installing-packages-globally). I also had similar issue and followed same instructions.

Yarn requires Node.js 4.0 or higher and not executing scripts

I want to start the server, but when I enter the command yarn run dev gives
Yarn requires Node.js 4.0 or higher to be installed.
I installed the latest available version of NodeJs, but nothing has changed. I also entered the command
npm install -g yarn, but nothing worked either. How else can you solve this problem?

If the NVM already installed, try at the terminal
$ source ~/.nvm/nvm.sh

Hadoop YARN vs Yarn package manager command conflict

I'm having an issue with the yarn command on my machine. I have both hadoop and yarn package manager(Javascript) installed on my machine. When I run yarn init it calls hadoop's YARN and responds with :
Error: Could not find or load main class path/to/folder
Can anyone please tell me how to separate the two commands. I am using a 64-bit windows 10 machine.

Turns out you can just use
yarnpkg
instead of
yarn

electron js with python 3.6, print error on npm start, downgrade python?

this is my first electron js installation, and I had to download and install its electron, NPM install (in the folder electron), but when at the start, failed.
error on print, or if I had to do python downgrade?
My error screenshot:

Make sure that you are writing python3 style code. Like when you write print It should be print(...)

I had a similar problem when installing on windows. Possible solutions:
First check the versions od npm and node, update it with this commands:
curl --silent --location https://rpm.nodesource.com/setup_6.x | bash
Install again node:
sudo apt-get install nodejs
And update:
npm update -g
If it doesn't work try to update or reinstall Phyton an put it in global environment variables path.
Check the electron git and try to download the last version manually.
Other solutions:
Install or reinstall Windows .Net.
Install or reinstall Visual Basic c++
Update the package dependencies of the node

Gulp run fails on windows | Error Message : Microsoft JScript compilation error, Invalid character

I installed Node.js on my windows 7 local machine as this link says :
install-node-js-npm-windows
After that i installed Gulp.js by this command through command line :
npm install -g gulp
And then i add this path to environment variables area :
C:\Users\Majid\AppData\Roaming\npm\node_modules\gulp\bin
Now when i try to run gulp by this command :
gulp
I got this error :
Windows Script Host
Line: 1
Char: 1
Error: Invalid character
Code: 800A03F6
Source: Microsoft JScript compilation error
How can i solve this error & how can i make gulp.js workable on windows OS?
EDIT AFTER THE ANSWER :
Error is still there.
I went to this path :
C:\Users\User_Name\AppData\Roaming\npm\node_modules\gulp\bin
In command line and tried this command :
node gulp.js install
But it tells :
No gulpfile found
You should know gulp was installed in previous steps successfully.(With some warnings)
The structure of gulp.js is for linux based operating systems.
I am looking for a way to make this file workable on windows os.
USAGE :
I want to run this javascript based web site on my local machine...

You need to run "node node_modules\gulp\bin\gulp.js install", just add "node" command in front of it and also refer to the link below for more
Error running gulp on Windows 10
I can't comment but did you run "npm install" after forking the repository, to install package.json "dependencies, dev-dependencies"?
Gulp need to be installed Globally and also in your current working directory.
Run the code below to installed Gulp globally, and the other to install the repository dependencies.
npm install -g gulp
npm install
This answer is correct, But what was the problem in my side?
I shouldn't add this path :
C:\Users\Majid\AppData\Roaming\npm\node_modules\gulp\bin
To environment variable area.
I went to the root folder in cmd & reinstalled gulp globally and re ran npm install & finally gulp watch worked very well.