why am I getting npm error when I try to run make dev-setup command?

[shokri-navid]

I installed Nextcloud V19 using this manual.
and I want to develop some sample app using Vuejs in Nextcloud. I tried to install this sample app using this app . but when I run make dev-setup I am getting long list of npm errors start with these lines:

npm ERR! code 1
npm ERR! git dep preparation failed
npm ERR! command /usr/local/bin/node /usr/local/lib/node_modules/npm/bin/npm-cli.js install --force --cache=/home/navid/.npm --prefer-offline=false --prefer-online=false --offline=false --no-progress --no-save --no-audit
npm ERR! npm WARN using --force Recommended protections disabled.
npm ERR! npm WARN ERESOLVE overriding peer dependency
npm ERR! npm WARN Found: [email protected]
npm ERR! npm WARN node_modules/webpack
npm ERR! npm WARN dev webpack@"^4.16.2" from the root project
npm ERR! npm WARN 2 more (babel-loader, css-loader)
npm ERR! npm WARN
npm ERR! npm WARN Could not resolve dependency:
npm ERR! npm WARN peer webpack@"^3.1.0" from [email protected]
npm ERR! npm WARN node_modules/extract-text-webpack-plugin
npm ERR! npm WARN dev extract-text-webpack-plugin@"^3.0.2" from the root project
npm ERR! npm WARN EBADENGINE Unsupported engine {
npm ERR! npm WARN EBADENGINE package: '[email protected]',
npm ERR! npm WARN EBADENGINE required: { node: '8.9.4', npm: '5.8.0' },
npm ERR! npm WARN EBADENGINE current: { node: 'v16.3.0', npm: '7.15.1' }
npm ERR! npm WARN EBADENGINE }
npm ERR! npm WARN deprecated [email protected]: See https://github.com/lydell/source-map-url#deprecated

These are my Environment specifications:
OS: LinuxLite 5.2 based on ubuntu 20.04
NodeJs: V16.3.0
NPM: 7.15.1

How can I get rid of this issue?

Work around:
1- I perform instructions in this link but no change in result :(
2- I installed multiple node version using n and try this command with different versions on node. but no change.
3- I try to download package manually one by one and I realize that the problem is about strengthify which need to download from github. downloading process raise this exception:

npm ERR! code 128
npm ERR! An unknown git error occurred
npm ERR! command git --no-replace-objects clone ssh://[email protected]/MorrisJobke/strengthify.git /root/.npm/_cacache/tmp/git-clone7a2NYq --recurse-submodules --depth=1
npm ERR! fatal: could not create leading directories of '/root/.npm/_cacache/tmp/git-clone7a2NYq': Permission denied

npm ERR! A complete log of this run can be found in:
npm ERR! /root/.npm/_logs/2022-01-13T18_20_29_689Z-debug-0.log

I try my npm command with sudo prefix and also sudo mode but no difference and the exception is still there :(