getting this error while installing frappe bench, how to resolve this?
Updating node libraries…
INFO:bench.utils:npm install
npm WARN deprecated browserslist@1.7.7: Browserslist 2 could fail on reading Browserslist >3.0 config used in other tools.
npm ERR! prepareGitDep 1>
npm ERR! prepareGitDep > uws@9.14.0 install /home/mujadidiainc/.npm/_cacache/tmp/git-clone-911555cb/node_modules/uws
npm ERR! prepareGitDep > node-gyp rebuild > build_log.txt 2>&1 || exit 0
npm ERR! prepareGitDep
npm ERR! prepareGitDep
npm ERR! prepareGitDep > wd@1.11.1 install /home/mujadidiainc/.npm/_cacache/tmp/git-clone-911555cb/node_modules/wd
npm ERR! prepareGitDep > node scripts/build-browser-scripts
npm ERR! prepareGitDep
npm ERR! prepareGitDep
npm ERR! prepareGitDep > sauce-connect-launcher@1.2.4 postinstall /home/mujadidiainc/.npm/_cacache/tmp/git-clone-911555cb/node_modules/sauce-connect-launcher
npm ERR! prepareGitDep > node scripts/install.js || nodejs scripts/install.js
npm ERR! prepareGitDep
npm ERR! prepareGitDep
npm ERR! prepareGitDep > parchment@2.0.0-dev prepare /home/mujadidiainc/.npm/_cacache/tmp/git-clone-911555cb
npm ERR! prepareGitDep > npm run build
npm ERR! prepareGitDep
npm ERR! prepareGitDep
npm ERR! prepareGitDep > parchment@2.0.0-dev build /home/mujadidiainc/.npm/_cacache/tmp/git-clone-911555cb
npm ERR! prepareGitDep > webpack --config webpack.conf.js
npm ERR! prepareGitDep
npm ERR! prepareGitDep
npm ERR! prepareGitDep 2> npm WARN install Usage of the --dev option is deprecated. Use --only=dev instead.
npm ERR! prepareGitDep npm WARN deprecated istanbul@0.4.5: This module is no longer maintained, try this instead:
npm ERR! prepareGitDep npm WARN deprecated npm i nyc
npm ERR! prepareGitDep npm WARN deprecated Visit Tools That Integrate With Istanbul API's for other alternatives.
npm ERR! prepareGitDep npm WARN deprecated circular-json@0.5.9: CircularJSON is in maintenance only, flatted is its successor.
npm ERR! prepareGitDep npm WARN deprecated nodemailer@2.7.2: All versions below 4.0.1 of Nodemailer are deprecated. See Status :: Nodemailer
npm ERR! prepareGitDep npm WARN deprecated babel-preset-es2015@6.24.1: 
Thanks for using Babel: we recommend using babel-preset-env now: please read babel-preset-es2015 -> babel-preset-env · Babel to update!
npm ERR! prepareGitDep npm WARN deprecated nomnom@1.8.1: Package no longer supported. Contact support@npmjs.com for more info.
npm ERR! prepareGitDep npm WARN deprecated uws@9.14.0: stop using this version
npm ERR! prepareGitDep npm WARN deprecated socks@1.1.9: If using 2.x branch, please upgrade to at least 2.1.6 to avoid a serious bug with socket data flow and an import issue introduced in 2.1.0
npm ERR! prepareGitDep npm WARN deprecated mailcomposer@4.0.1: This project is unmaintained
npm ERR! prepareGitDep npm WARN deprecated node-uuid@1.4.8: Use uuid module instead
npm ERR! prepareGitDep npm WARN deprecated buildmail@4.0.1: This project is unmaintained
npm ERR! prepareGitDep npm WARN deprecated cryptiles@2.0.5: This version is no longer maintained. Please upgrade to the latest version.
npm ERR! prepareGitDep npm WARN deprecated boom@2.10.1: This version is no longer maintained. Please upgrade to the latest version.
npm ERR! prepareGitDep npm WARN deprecated hoek@2.16.3: This version is no longer maintained. Please upgrade to the latest version.
npm ERR! prepareGitDep /home/mujadidiainc/.npm/_cacache/tmp/git-clone-911555cb/node_modules/webpack-cli/bin/config-yargs.js:89
npm ERR! prepareGitDep describe: optionsSchema.definitions.output.properties.path.description,
npm ERR! prepareGitDep ^
npm ERR! prepareGitDep
npm ERR! prepareGitDep TypeError: Cannot read property ‘properties’ of undefined
npm ERR! prepareGitDep at module.exports (/home/mujadidiainc/.npm/_cacache/tmp/git-clone-911555cb/node_modules/webpack-cli/bin/config-yargs.js:89:48)
npm ERR! prepareGitDep at /home/mujadidiainc/.npm/_cacache/tmp/git-clone-911555cb/node_modules/webpack-cli/bin/webpack.js:60:27
npm ERR! prepareGitDep at Object. (/home/mujadidiainc/.npm/_cacache/tmp/git-clone-911555cb/node_modules/webpack-cli/bin/webpack.js:515:3)
npm ERR! prepareGitDep at Module._compile (internal/modules/cjs/loader.js:689:30)
npm ERR! prepareGitDep at Object.Module._extensions…js (internal/modules/cjs/loader.js:700:10)
npm ERR! prepareGitDep at Module.load (internal/modules/cjs/loader.js:599:32)
npm ERR! prepareGitDep at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
npm ERR! prepareGitDep at Function.Module._load (internal/modules/cjs/loader.js:530:3)
npm ERR! prepareGitDep at Module.require (internal/modules/cjs/loader.js:637:17)
npm ERR! prepareGitDep at require (internal/modules/cjs/helpers.js:22:18)
npm ERR! prepareGitDep npm ERR! code ELIFECYCLE
npm ERR! prepareGitDep npm ERR! errno 1
npm ERR! prepareGitDep npm ERR! parchment@2.0.0-dev build: webpack --config webpack.conf.js
npm ERR! prepareGitDep npm ERR! Exit status 1
npm ERR! prepareGitDep npm ERR!
npm ERR! prepareGitDep npm ERR! Failed at the parchment@2.0.0-dev build script.
npm ERR! prepareGitDep npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! prepareGitDep
npm ERR! prepareGitDep npm ERR! A complete log of this run can be found in:
npm ERR! prepareGitDep npm ERR! /home/mujadidiainc/.npm/_logs/2019-02-06T07_22_14_141Z-debug.log
npm ERR! prepareGitDep npm ERR! code ELIFECYCLE
npm ERR! prepareGitDep npm ERR! errno 1
npm ERR! prepareGitDep npm ERR! parchment@2.0.0-dev prepare: npm run build
npm ERR! prepareGitDep npm ERR! Exit status 1
npm ERR! prepareGitDep npm ERR!
npm ERR! prepareGitDep npm ERR! Failed at the parchment@2.0.0-dev prepare script.
npm ERR! prepareGitDep npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! prepareGitDep
npm ERR! prepareGitDep npm ERR! A complete log of this run can be found in:
npm ERR! prepareGitDep npm ERR! /home/mujadidiainc/.npm/_logs/2019-02-06T07_22_14_375Z-debug.log
npm ERR! prepareGitDep
npm ERR! premature close
npm ERR! A complete log of this run can be found in:
npm ERR! /home/mujadidiainc/.npm/_logs/2019-02-06T07_22_15_061Z-debug.log
Traceback (most recent call last):
File “/home/mujadidiainc/.local/bin/bench”, line 11, in
sys.exit(cli())
File “/home/mujadidiainc/.local/lib/python2.7/site-packages/bench/cli.py”, line 40, in cli
bench_command()
File “/home/mujadidiainc/.local/lib/python2.7/site-packages/click/core.py”, line 764, in call
return self.main(*args, **kwargs)
File “/home/mujadidiainc/.local/lib/python2.7/site-packages/click/core.py”, line 717, in main
rv = self.invoke(ctx)
File “/home/mujadidiainc/.local/lib/python2.7/site-packages/click/core.py”, line 1137, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File “/home/mujadidiainc/.local/lib/python2.7/site-packages/click/core.py”, line 956, in invoke
return ctx.invoke(self.callback, **ctx.params)
File “/home/mujadidiainc/.local/lib/python2.7/site-packages/click/core.py”, line 555, in invoke
return callback(*args, **kwargs)
File “/home/mujadidiainc/.local/lib/python2.7/site-packages/bench/commands/make.py”, line 21, in init
verbose=verbose, clone_from=clone_from, skip_bench_mkdir=skip_bench_mkdir, skip_redis_config_generation=skip_redis_config_generation)
File “/home/mujadidiainc/.local/lib/python2.7/site-packages/bench/utils.py”, line 72, in init
update_npm_packages(bench_path=path)
File “/home/mujadidiainc/.local/lib/python2.7/site-packages/bench/utils.py”, line 442, in update_npm_packages
exec_cmd(‘npm install’, cwd=bench_path)
File “/home/mujadidiainc/.local/lib/python2.7/site-packages/bench/utils.py”, line 140, in exec_cmd
raise CommandFailedError(cmd)
bench.utils.CommandFailedError: npm install
