npm run dev erors about sample-media-pwa HOT 3 OPEN

I also get error
`> [email protected] copy-client C:\Users\User\Desktop\sample-media-pwa

copy "src/client//." "!src/client/scripts//." "!src/client/styles//." "!src/client/videos//." dist/client

The syntax of the command is incorrect.
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] copy-client: copy "src/client/**/*.*" "!src/client/scripts/**/*.*" "!src/client/styles/**/*.*" "!src/client/videos/**/*.*" dist/client
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] copy-client script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\User\AppData\Roaming\npm-cache_logs\2018-09-13T03_34_36_502Z-debug.log
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] copy-all: npm run copy-server && npm run copy-config && npm run copy-views && npm run copy-client
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] copy-all script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\User\AppData\Roaming\npm-cache_logs\2018-09-13T03_34_37_021Z-debug.log
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] build: npm run clean-dist && npm run make-dist && npm run make-client && npm run copy-all && npm run build-js && npm run build-sass && npm run build-resource-list
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\User\AppData\Roaming\npm-cache_logs\2018-09-13T03_34_37_149Z-debug.log
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] dev: npm run build && parallelshell "npm run watch" "npm run serve"
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] dev script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\User\AppData\Roaming\npm-cache_logs\2018-09-13T03_34_37_228Z-debug.log`

from sample-media-pwa.

In my case removing node_modules and ~/.node-gyp folders and running
npm install and
npm update
after, solved the problem

from sample-media-pwa.

I also get error
`> [email protected] copy-client C:\Users\User\Desktop\sample-media-pwa

copy "src/client//." "!src/client/scripts//." "!src/client/styles//." "!src/client/videos//." dist/client

...

I had the same problem, the command copy is from a npm library /jonschlinkert/copy.

I've installed the library globally, also since it didn't find the command I've replaced the command in the package.json with the full path of the binary

npm install --global copy

// package.json
"scripts": {
    ...
    "copy-client": "C:/nvm/v8.11.1/copy \"src/client/**/*.*\" \"!src/client/scripts/**/*.*\" \"!src/client/styles/**/*.*\" \"!src/client/videos/**/*.*\" \"dist/client\"",

This worked for me

from sample-media-pwa.