Problem with Android release build compilation

.gitignore

@@ -29,6 +29,7 @@ build/
 local.properties
 *.iml
 hs_err_pid*.log
+java_pid*.hprof
 
 # node.js
 #

android/app/src/main/java/com/una/android/MainApplication.java

@@ -34,6 +34,11 @@ public class MainApplication extends Application implements ReactApplication {
         protected String getJSMainModuleName() {
           return "index";
         }
+
+        @Override
+        protected @Nullable String getBundleAssetName() {
+          return "app.bundle";
+        }
       };
 
   @Override

android/build.gradle

@@ -12,7 +12,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath("com.android.tools.build:gradle:3.5.2")
+        classpath('com.android.tools.build:gradle:3.6.3')
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

android/gradle.properties

@@ -10,7 +10,7 @@
 # Specifies the JVM arguments used for the daemon process.
 # The setting is particularly useful for tweaking memory settings.
 # Default value: -Xmx10248m -XX:MaxPermSize=256m
-# org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
+org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
 
 # When configured, Gradle will run in incubating parallel mode.
 # This option should only be used with decoupled projects. More details, visit