Apps Error while waiting for device: The emulator process for AVD Nexus_5X_API_23 was killed.

[tarkesh]

Android studio version 23 marshmallow

configuration for android studio:
minSdkVersion 21
targetSdkVersion 23

when i am trying to run my app in emulator (nexus 5x api 23 android 6.0). that time i am getting below error
Error while waiting for device: The emulator process for AVD Nexus_5X_API_23 was killed.