title: Task :app:transformClassesWithMultidexlistForDebug FAILED
body: <p>A lot of people had the same error and most of their solutions worked, but not for me. I just can't see to run the code. </p>
  
  <p>I tried <code>clean/rebuild</code>, <code>multiDexEnabled true</code>, I also tried tweaking the <code>.gradle</code> file which I just don't understand. </p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 29
      buildToolsVersion "29.0.2"
      defaultConfig {
          applicationId "com.example.qrbarcodescanner"
          minSdkVersion 15
          targetSdkVersion 29
          versionCode 1
          versionName "1.0"
          testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
          multiDexEnabled true
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
          }
      }
  
  }
  
  dependencies {
      implementation fileTree(dir: 'libs', include: ['*.jar'])
      implementation 'me.dm7.barcodescanner:zxing:1.9'
      implementation 'androidx.appcompat:appcompat:1.1.0'
      implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
      testImplementation 'junit:junit:4.12'
      androidTestImplementation 'androidx.test:runner:1.3.0-alpha02'
      androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0-alpha02'
  }
  </code></pre>
  
  <p>I just want to get rid of the pesky <code>Task :app:transformClassesWithMultidexlistForDebug FAILED error</code>. Any help will be appreciated. Thank you</p>