monaca Android のリリースビルドが出来ない

以下に出力されたメッセージを貼り付けます。
よろしくお願い致します。

Fetch queue Info...
Start building 59410ec2ff2af2a13e6a1412
Setup working directories...
Download project archive...
Extract project archive...
Fetch project info...
Webview:crosswalk
Arch:x86
cordova version: 6.2.0

preBuild -

buildForAndroid

Cordova create -

$ /data/build-server/cordova/6.2.0/bin/cordova create /tmp/monaca/59410ec2ff2af2a13e6a1412/project
Creating a new cordova project.

Copy .monaca-res directory -
Cordova platform add -

$ /data/build-server/cordova/6.2.0/bin/cordova platform list
$ /data/build-server/cordova/6.2.0/bin/cordova platform add /data/build-server/cordova/platforms/android/5.1.1
Adding android project...
Creating Cordova project for the Android platform:
Path: platforms/android
Package: io.cordova.hellocordova
Name: HelloCordova
Activity: MainActivity
Android target: android-23
Android project created with cordova-android@5.1.1
Discovered plugin "cordova-plugin-whitelist" in config.xml. Adding it to the project
Fetching plugin "cordova-plugin-whitelist@1" via npm
Installing "cordova-plugin-whitelist" for android

           This plugin is only applicable for versions of cordova-android greater than 4.0. If you have a previous platform version, you do *not* need this plugin since the whitelist will be built in.

Copy config.xml -
Copy external plugin setting files -
Copy files for signing -
Copy www files -
Cordova plugin add -

$ /data/build-server/cordova/6.2.0/bin/cordova plugin add mobi.monaca.plugins.Monaca
$ /data/build-server/cordova/6.2.0/bin/cordova plugin add cordova-plugin-whitelist@1.2.2
$ /data/build-server/cordova/6.2.0/bin/cordova plugin add cordova-plugin-splashscreen@3.2.2
$ /data/build-server/cordova/6.2.0/bin/cordova plugin add cordova-custom-config@2.0.3
$ /data/build-server/cordova/6.2.0/bin/cordova plugin add cordova-plugin-crosswalk-webview@1.7.2 --variable XWALK_VERSION=18.48.477.13
$ /data/build-server/cordova/6.2.0/bin/cordova plugin add cordova-plugin-inappbrowser@1.5.0
$ /data/build-server/cordova/6.2.0/bin/cordova plugin add cordova-plugin-network-information@1.2.1
$ /data/build-server/cordova/6.2.0/bin/cordova plugin add cordova-plugin-dialogs@1.2.1
$ /data/build-server/cordova/6.2.0/bin/cordova plugin add ncmb-push-monaca-plugin@2.0.6

Cordova prepare -

$ /data/build-server/cordova/6.2.0/bin/cordova prepare android
cordova-custom-config: Skipping auto-restore of config file backup(s)

Cordova compile -

$ /data/build-server/cordova/6.2.0/bin/cordova compile --release --device
ANDROID_HOME=/data/android-sdk
JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_111.jdk/Contents/Home
null
org.xwalk:xwalk_core_library:18.48.477.13
:preBuild UP-TO-DATE
:preArmv7ReleaseBuild UP-TO-DATE
:checkArmv7ReleaseManifest
:preX86ReleaseBuild UP-TO-DATE
:CordovaLib:preBuild UP-TO-DATE
:CordovaLib:preReleaseBuild UP-TO-DATE
:CordovaLib:compileReleaseNdk UP-TO-DATE
:CordovaLib:compileLint
:CordovaLib:copyReleaseLint UP-TO-DATE
:CordovaLib:mergeReleaseProguardFiles
:CordovaLib:packageReleaseRenderscript UP-TO-DATE
:CordovaLib:checkReleaseManifest
:CordovaLib:prepareReleaseDependencies
:CordovaLib:compileReleaseRenderscript
:CordovaLib:generateReleaseResValues
:CordovaLib:generateReleaseResources
:CordovaLib:packageReleaseResources
:CordovaLib:compileReleaseAidl
:CordovaLib:generateReleaseBuildConfig
:CordovaLib:generateReleaseAssets UP-TO-DATE
:CordovaLib:mergeReleaseAssets
:CordovaLib:processReleaseManifest
:CordovaLib:processReleaseResources
:CordovaLib:generateReleaseSources
:CordovaLib:compileReleaseJavaWithJavac
:CordovaLib:processReleaseJavaRes UP-TO-DATE
:CordovaLib:transformResourcesWithMergeJavaResForRelease
:CordovaLib:transformClassesAndResourcesWithSyncLibJarsForRelease
:CordovaLib:mergeReleaseJniLibFolders
:CordovaLib:transformNative_libsWithMergeJniLibsForRelease
:CordovaLib:transformNative_libsWithSyncJniLibsForRelease
:CordovaLib:bundleRelease
:prepareAndroidCordovaLibUnspecifiedReleaseLibrary
:preArmv7DebugBuild UP-TO-DATE
:preX86DebugBuild UP-TO-DATE
:CordovaLib:preDebugBuild UP-TO-DATE
:CordovaLib:compileDebugNdk UP-TO-DATE
:CordovaLib:copyDebugLint UP-TO-DATE
:CordovaLib:mergeDebugProguardFiles
:CordovaLib:packageDebugRenderscript UP-TO-DATE
:CordovaLib:checkDebugManifest
:CordovaLib:prepareDebugDependencies
:CordovaLib:compileDebugRenderscript
:CordovaLib:generateDebugResValues
:CordovaLib:generateDebugResources
:CordovaLib:packageDebugResources
:CordovaLib:compileDebugAidl
:CordovaLib:generateDebugBuildConfig
:CordovaLib:generateDebugAssets UP-TO-DATE
:CordovaLib:mergeDebugAssets
:CordovaLib:processDebugManifest
:CordovaLib:processDebugResources
:CordovaLib:generateDebugSources
:CordovaLib:compileDebugJavaWithJavac
:CordovaLib:processDebugJavaRes UP-TO-DATE
:CordovaLib:transformResourcesWithMergeJavaResForDebug
:CordovaLib:transformClassesAndResourcesWithSyncLibJarsForDebug
:CordovaLib:mergeDebugJniLibFolders
:CordovaLib:transformNative_libsWithMergeJniLibsForDebug
:CordovaLib:transformNative_libsWithSyncJniLibsForDebug
:CordovaLib:bundleDebug
:prepareComAndroidSupportSupportV42221Library
:prepareComGoogleAndroidGmsPlayServicesBase810Library
:prepareComGoogleAndroidGmsPlayServicesBasement810Library
:prepareComGoogleAndroidGmsPlayServicesGcm810Library
:prepareOrgXwalkXwalk_core_library184847713Library
:prepareArmv7ReleaseDependencies
:compileArmv7ReleaseAidl
:compileArmv7ReleaseRenderscript
:generateArmv7ReleaseBuildConfig
:generateArmv7ReleaseAssets UP-TO-DATE
:mergeArmv7ReleaseAssets
:createXwalkCommandLineFileArmv7Release
:generateArmv7ReleaseResValues
:generateArmv7ReleaseResources
:mergeArmv7ReleaseResources
AAPT: libpng error: Not a PNG file
AAPT: libpng error: Not a PNG file
AAPT: libpng error: Not a PNG file
AAPT: libpng error: Not a PNG file
AAPT: libpng error: Not a PNG file
:mergeArmv7ReleaseResources FAILED

BUILD FAILED

Total time: 6.546 secs

postBuild -

Remove working directories...
Build Error: Error: Sandbox Exec Error: [ 注意:一部の入力ファイルは非推奨のAPIを使用またはオーバーライドしています。
注意:詳細は、-Xlint:deprecationオプションを指定して再コンパイルしてください。
注意:一部の入力ファイルは非推奨のAPIを使用またはオーバーライドしています。
注意:詳細は、-Xlint:deprecationオプションを指定して再コンパイルしてください。
AAPT err(Facade for 83945837) : No Delegate set : lost message:libpng error: Not a PNG file

FAILURE: Build failed with an exception.

What went wrong:

Execution failed for task ':mergeArmv7ReleaseResources'.

Some file crunching failed, see logs for details

Try:

Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
Error: Error code 1 for command: /private/tmp/monaca/59410ec2ff2af2a13e6a1412/project/platforms/android/gradlew with args: cdvBuildRelease,-b,/private/tmp/monaca/59410ec2ff2af2a13e6a1412/project/platforms/android/build.gradle,-Dorg.gradle.daemon=true,-Pandroid.useDeprecatedNdk=true
]