Unable to start AVD in emulator.? android studio

Question

my emulator is not running and gives an error in the image below

error image

and test in the launch window

C: \ Users \ Wahlah \ AppData \ Local \ Android \ SDK \ Tools \ emulator.exe -netdelay gprs -netspeed full -avd Nexus_4_API_21 This application asked Runtime to terminate it in an unusual way. For more information, contact support. terminate call after calling instance 'std :: logic_error' what (): basic_string :: _ S_construct null is invalid

and there is a second error - this is an image

ERROR 2

Answer 1

( ).

(C:\...emulator.exe) , - , ANDROID_SDK_ROOT ( sdk sdk).

,

C:\Users\<username>\AppData\Local\Android

C:\Users\<username>\AppData\Local\Android\sdk

... ! .

, Windows , , , AIR TRAVELS .

Answer 2

, , " " "" > "Android" > " AVD" > "" > " " > "" " " " ". , .

Answer 3

You can fix this error, you need to configure the device again. Download all the required libraries through the SDK manager.