error

[ThomasGuoItaly]

ionic\app-scripts\bin\ionic-app-scripts.js'
[app-scripts] at Function.Module._resolveFilename (internal/modules/cjs/loader.js:613:15)
[app-scripts] at Function.Module._load (internal/modules/cjs/loader.js:539:25)
[app-scripts] at Function.Module.runMain (internal/modules/cjs/loader.js:801:12)
[app-scripts] at internal/main/run_main_module.js:21:11

[ERROR] ionic-app-scripts has unexpectedly closed (exit code 1)