Ionic 3.0.1 UglifyJs error

When try to build the app in --prod mode I get this unfriendly error:

ionic-app-scripts build “–prod”

[15:59:27] ionic-app-scripts 1.3.0
[15:59:27] build prod started …
[15:59:27] clean started …
[15:59:27] clean finished in 3 ms
[15:59:27] copy started …
[15:59:27] ngc started …
[15:59:53] ngc finished in 25.96 s
[15:59:53] preprocess started …
[15:59:53] deeplinks started …
[15:59:54] deeplinks finished in 641 ms
[15:59:54] optimization started …
[15:59:54] copy finished in 27.11 s
[16:00:12] optimization finished in 18.02 s
[16:00:12] preprocess finished in 18.66 s
[16:00:12] webpack started …
[16:00:20] webpack finished in 8.08 s
[16:00:20] sass started …
[16:00:20] uglifyjs started …
[16:00:20] ionic-app-script task: “build”
[16:00:20] Error: [object Object]
Error: [object Object]
at BuildError.Error (native)
at new BuildError (node_modules@ionic\app-scr
ipts\dist\util\errors.js:16:28)
at ChildProcess. (node_modules@ion
ic\app-scripts\dist\worker-client.js:38:24)
at emitTwo (events.js:106:13)
at ChildProcess.emit (events.js:191:7)
at process.nextTick (internal/child_process.js:744:12)
at _combinedTickCallback (internal/process/next_tick.js:67:7)
at process._tickCallback (internal/process/next_tick.js:98:9)

What version of @ionic/app-scripts are you using? Could be related to an outdated version. I’d suggest running

npm install @ionic/app-scripts@latest --save-dev

To grab the most up to date version