React native أريد عمل run لتطبيقى ولكن يظهر الخطأ التالى فى الكونسول

عندما اكتب 

npx react-native run-android

يظهر الخطأ التالى 

> Task :app:compileDebugJavaWithJavac FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug
option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 9m 54s
776 actionable tasks: 776 executed
error Could not install the app on the device, read the error above for details.

Make sure you have an Android emulator running or a device connected and have
set up your Android development environment:
https://facebook.github.io/react-native/docs/getting-started.html
error Command failed: gradlew.bat app:installDebug. Run CLI with --verbose flag
for more details.
npm ERR! code 1
npm ERR! path G:\My Projects\Work\elavait2
npm ERR! command failed
npm ERR! command C:\Windows\system32\cmd.exe /d /s /c react-native run-android

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Ahmed\AppData\Local\npm-cache\_logs\2021-01-18T17_49_40_63
6Z-debug.log