node error

45925 info lifecycle node-sass@4.7.2~postinstall: node-sass@4.7.2
45926 verbose lifecycle node-sass@4.7.2~postinstall: unsafe-perm in lifecycle true
45927 verbose lifecycle node-sass@4.7.2~postinstall: PATH: /edx/app/edxapp/nodeenvs/edxapp/lib/node_modules/npm/bin/node-gyp-bin:/edx/app/edxapp/edx-platform/node_modules/node-sass/node_modules/.bin:/edx/app/edxapp/edx-platform/node_modules/.bin:/edx/app/edxapp/venvs/edxapp/bin:/edx/app/edxapp/edx-platform/bin:/edx/app/edxapp/edx-platform/node_modules/.bin:/edx/app/edxapp/nodeenvs/edxapp/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
45928 verbose lifecycle node-sass@4.7.2~postinstall: CWD: /edx/app/edxapp/edx-platform/node_modules/node-sass
45929 silly lifecycle node-sass@4.7.2~postinstall: Args: [ '-c', 'node scripts/build.js' ]
45930 silly lifecycle node-sass@4.7.2~postinstall: Returned: code: 135  signal: null
45931 info lifecycle node-sass@4.7.2~postinstall: Failed to exec postinstall script
45932 verbose unlock done using /edx/app/edxapp/.npm/_locks/staging-af258d8967b39536.lock for /edx/app/edxapp/edx-platform/node_modules/.staging
45933 warn edx@0.1.0 No repository field.
45934 warn edx@0.1.0 No license field.
45935 verbose stack Error: node-sass@4.7.2 postinstall: `node scripts/build.js`
45935 verbose stack Exit status 135
45935 verbose stack     at EventEmitter.<anonymous> (/edx/app/edxapp/nodeenvs/edxapp/lib/node_modules/npm/node_modules/npm-lifecycle/index.js:280:16)
45935 verbose stack     at emitTwo (events.js:126:13)
45935 verbose stack     at EventEmitter.emit (events.js:214:7)
45935 verbose stack     at ChildProcess.<anonymous> (/edx/app/edxapp/nodeenvs/edxapp/lib/node_modules/npm/node_modules/npm-lifecycle/lib/spawn.js:55:14)
45935 verbose stack     at emitTwo (events.js:126:13)
45935 verbose stack     at ChildProcess.emit (events.js:214:7)
45935 verbose stack     at maybeClose (internal/child_process.js:925:16)
45935 verbose stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:209:5)
45936 verbose pkgid node-sass@4.7.2
45937 verbose cwd /edx/app/edxapp/edx-platform
45938 verbose Linux 4.15.0-1088-gcp
45939 verbose argv "/edx/app/edxapp/nodeenvs/edxapp/bin/node" "/edx/app/edxapp/nodeenvs/edxapp/bin/npm" "install"
45940 verbose node v8.9.3
45941 verbose npm  v5.5.1
45942 error code ELIFECYCLE
45943 error errno 135
45944 error node-sass@4.7.2 postinstall: `node scripts/build.js`
45944 error Exit status 135
45945 error Failed at the node-sass@4.7.2 postinstall script.
45945 error This is probably not a problem with npm. There is likely additional logging output above.
45946 verbose exit [ 135, true ]