Errors when upgrading angular 4.4.2

[vincent-cm]

Errors are shown after upgrading angular from 4.4.1 to 4.4.2
Following is the first line error when trying to bootstrap angular2 app

[WDS] Errors while compiling. Reload prevented.
errors @ webpack-dev-server.js:1
s.onmessage @ webpack-dev-server.js:1
n.dispatchEvent @ webpack-dev-server.js:1
(anonymous) @ webpack-dev-server.js:1
o._transportMessage @ webpack-dev-server.js:1
n.emit @ webpack-dev-server.js:1
ws.onmessage @ webpack-dev-server.js:1
wrapFn @ zone.js:1075
ZoneDelegate.invokeTask @ zone.js:425
Zone.runTask @ zone.js:192
ZoneTask.invokeTask @ zone.js:499
invokeTask @ zone.js:1427
globalZoneAwareCallback @ zone.js:1445
webpack-dev-server.js:1 ./node_modules/pac-resolver/dnsResolve.js
Module not found: Error: Can't resolve 'dns' in '~/node_modules/pac-resolver'
 @ ./node_modules/pac-resolver/dnsResolve.js 6:10-24
 @ ./node_modules/pac-resolver/index.js
 @ ./node_modules/pac-proxy-agent/index.js
 @ ./node_modules/proxy-agent/index.js
 @ ./node_modules/superagent-proxy/index.js
 @ ./node_modules/dropbox/dist/Dropbox-sdk.min.js
 @ ./src/app/utility/serviceHelper.ts
 @ ./src/app/app.module.ts
 @ ./src/app/index.ts
 @ ./src/main.browser.ts
 @ multi (webpack)-dev-server/client?http://0.0.0.0:8080 ./src/main.browser.ts

[shellscape]

@vincent-cm glad you got your issue resolved. please note that in the future if you remove our issue template instead of filling it out, your issue might be closed