Can't build release APK from react native

I developed an app using react native, and I don't have a lot of knowledge about native iOS or Android. I have already released my app for iOS, however, now that I'm trying to do the same thing for the Google Play Store I'm facing some problems that I don't know how to solve. I'm following the instructions from the official react native website, but can't get pass the $ ./gradlew assembleRelease step. I fixed some errors but now I get the following when running the command with --info :

> Task :react-native-braintree-xplat:verifyReleaseResources FAILED
Putting task artifact state for task ':react-native-braintree-xplat:verifyReleaseResources' into context took 0.0 secs.
Up-to-date check for task ':react-native-braintree-xplat:verifyReleaseResources' took 0.0 secs. It is not up-to-date because:
  Task has failed previously.
All input files are considered out-of-date for incremental task ':react-native-braintree-xplat:verifyReleaseResources'.
Unable do incremental execution: full task run
QueuedCruncher is using /Users/armuars/Library/Android/sdk/build-tools/27.0.3/aapt

Shutdown finished in 0ms

:react-native-braintree-xplat:verifyReleaseResources (Thread[Task worker for ':' Thread 3,5,main]) completed. Took 0.7 secs.
:react-native-svg:platformAttrExtractor (Thread[Task worker for ':',5,main]) completed. Took 10.698 secs.
:react-native-vector-icons:platformAttrExtractor (Thread[Daemon worker Thread 23,5,main]) completed. Took 10.461 secs.

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':react-native-braintree-xplat:verifyReleaseResources'.
> com.android.ide.common.process.ProcessException: Failed to execute aapt

* Try:
Run with --stacktrace option to get the stack trace. Run with --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 5m 19s
173 actionable tasks: 152 executed, 21 up-to-date

I don't know if the problem is directly with the braintree xplat library or something else.

Any help would be appreciated.

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