Hello Emil,
If you have not changed the source - you can use our nightly builds that are published every night to nexus sonatype maven repo.
To use it:
repositories {
…
maven {
url “https://oss.sonatype.org/content/repositories/snapshots 2”
}
}
dependencies {
implementation ‘androidx.appcompat:appcompat:1.1.0’
implementation ‘org.pytorch:pytorch_android:1.4.0-SNAPSHOT’
implementation ‘org.pytorch:pytorch_android_torchvision:1.4.0-SNAPSHOT’
}
I rechecked HelloWorldApp with the latest published 1.4.0-SNAPSHOT - it works fine.

About your failure:

It looks like that in your aar you do not have dependency: ( com.facebook.soloader:nativeloader )
which was added after 1.3.0 release:

  
      github.com
  
  
    pytorch/pytorch/blob/master/android/pytorch_android/build.gradle#L59 4



    useLibrary 'android.test.runner'
    useLibrary 'android.test.base'
    useLibrary 'android.test.mock'
}


dependencies {
    api project(':fbjni')


    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.facebook.soloader:nativeloader:0.8.0'


    testImplementation 'junit:junit:' + rootProject.junitVersion
    testImplementation 'androidx.test:core:' + rootProject.coreVersion


    androidTestImplementation 'junit:junit:' + rootProject.junitVersion
    androidTestImplementation 'androidx.test:core:' + rootProject.coreVersion
    androidTestImplementation 'androidx.test.ext:junit:' + rootProject.extJUnitVersion
    androidTestImplementation 'androidx.test:rules:' + rootProject.rulesVersion
    androidTestImplementation 'androidx.test:runner:' + rootProject.runnerVersion
}



  
  
    
    
  
  


Please add it manually:
implementation ‘com.facebook.soloader:nativeloader:0.8.0’
In case of using maven dependency gradle will parse pom file that has this dependency and add it automatically. For manual aar files we have to add all transitive dependencies manually.