Not able to make release build in android 

I am getting this issue  when trying to make build using  ./gradlew assembleRelease
```
FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':react-native-paytm:verifyReleaseResources'.
> com.android.ide.common.process.ProcessException: Failed to execute aapt
```
How can I fix it? 
