I’m trying to generate an Android build of my project with react-native(npx expo run: android), but I’m getting some errors. One of them is the one below, I didn’t understand it very well because I received a generic error in the compilation log:

> Task :app:compileDebugJavaWithJavac FAILED
C:Projetosschool-frontendandroidappsrcmainjavabrcomschoolmobileinspellMainApplication.java:65: error: cannot find symbol
      ReactFeatureFlags.unstable_useRuntimeSchedulerAlways = false;
                       ^
  symbol:   variable unstable_useRuntimeSchedulerAlways
  location: class ReactFeatureFlags
C:Projetosschool-frontendandroidappsrcmainjavaischoolmobileMainActivity.java:19: error: package R does not exist
    setTheme(R.style.AppTheme);
              ^
C:Projetosschool-frontendandroidappsrcmainjavaischoolmobileMainActivity.java:39: error: cannot find symbol
    return new ReactActivityDelegateWrapper(this, BuildConfig.IS_NEW_ARCHITECTURE_ENABLED, new DefaultReactActivityDelegate(
                                                  ^
  symbol:   variable BuildConfig
  location: class MainActivity
C:Projetosschool-frontendandroidappsrcmainjavaischoolmobileMainApplication.java:29: error: cannot find symbol
        return BuildConfig.DEBUG;
               ^
  symbol: variable BuildConfig
C:Projetosschool-frontendandroidappsrcmainjavaischoolmobileMainApplication.java:48: error: cannot find symbol
        return BuildConfig.IS_NEW_ARCHITECTURE_ENABLED;
               ^
  symbol: variable BuildConfig
C:Projetosschool-frontendandroidappsrcmainjavaischoolmobileMainApplication.java:53: error: cannot find symbol
        return BuildConfig.IS_HERMES_ENABLED;
               ^
  symbol: variable BuildConfig
C:Projetosschool-frontendandroidappsrcmainjavaischoolmobileMainApplication.java:66: error: cannot find symbol
    if (!BuildConfig.REACT_NATIVE_UNSTABLE_USE_RUNTIME_SCHEDULER_ALWAYS) {
         ^
  symbol:   variable BuildConfig
  location: class MainApplication
C:Projetosschool-frontendandroidappsrcmainjavaischoolmobileMainApplication.java:67: error: cannot find symbol
      ReactFeatureFlags.unstable_useRuntimeSchedulerAlways = false;
                       ^
  symbol:   variable unstable_useRuntimeSchedulerAlways
  location: class ReactFeatureFlags
C:Projetosschool-frontendandroidappsrcmainjavaischoolmobileMainApplication.java:69: error: cannot find symbol
    if (BuildConfig.IS_NEW_ARCHITECTURE_ENABLED) {
        ^
  symbol:   variable BuildConfig
  location: class MainApplication
C:Projetosschool-frontendandroidappsrcmainjavaischoolmobileMainApplication.java:73: error: cannot find symbol
    if (BuildConfig.DEBUG) {
        ^
  symbol:   variable BuildConfig
  location: class MainApplication
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
10 errors

FAILURE: Build failed with an exception.

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

Meu arquivo dentro de ./android/build.grsdle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    ext {
        buildToolsVersion = findProperty('android.buildToolsVersion') ?: '34.0.0'
        minSdkVersion = Integer.parseInt(findProperty('android.minSdkVersion') ?: '23')
        compileSdkVersion = Integer.parseInt(findProperty('android.compileSdkVersion') ?: '34')
        targetSdkVersion = Integer.parseInt(findProperty('android.targetSdkVersion') ?: '34')
        kotlinVersion = findProperty('android.kotlinVersion') ?: '1.9.22'
        frescoVersion = findProperty('expo.frescoVersion') ?: '2.5.0'

        // We use NDK 23 which has both M1 support and is the side-by-side NDK version from AGP.
        ndkVersion = "26.1.10909125"
    }
    repositories {
        google()
        mavenCentral()
    }
    dependencies {
        classpath 'com.google.gms:google-services:4.4.2'
        classpath('com.android.tools.build:gradle:7.4.2')
        classpath('com.facebook.react:react-native-gradle-plugin')
    }
}

allprojects {
    repositories {
        maven {
            // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
            url(new File(['node', '--print', "require.resolve('react-native/package.json')"].execute(null, rootDir).text.trim(), '../android'))
        }
        maven {
            // Android JSC is installed from npm
            url(new File(['node', '--print', "require.resolve('jsc-android/package.json')"].execute(null, rootDir).text.trim(), '../dist'))
        }

        google()
        mavenCentral()
        maven { url 'https://www.jitpack.io' }
        maven { url "$rootDir/../node_modules/@notifee/react-native/android/libs" }
    }
}

• yarn upgrade –latest
• .gradlew clean
• ./gradlew :app:assembleRelease