Root is not needed. No, not just through cmd, you need ADB, fastest way to get it is from here:
Many of the issues encountered by users can be tracked down by the team using a log produced by ADB (Android Debug Bridge) Logcat. Whenever encountering obvious failures like app crashes, background services crashes, etc. you should always attach a log to your bug report. Bug reports for such...
xiaomi.eu
Extract adb.zip and run the command in the extracted folder with Command prompt, while phone is connected to PC with USB debugging enabled.
P.S. if you're a newb, you shouldn't be uninstalling system apps.