title: Execution failed for task ':app:uploadCrashlyticsMappingFileRelease'.Host name must not be empty
body: <p>When trying to create a release signed apk, Build fails at task<br>
  <code>app:uploadCrashlyticsMappingFileRelease'.Host name must not be empty.</code></p>
  <p><strong>I have enabled obfuscation</strong> .</p>
  <pre><code>buildTypes {
  
          release {
  
              minifyEnabled true // Enables code shrinking, obfuscation, and optimization
  
              shrinkResources true // Enables resource shrinking, which is performed by the Android Gradle plugin
  
  
              firebaseCrashlytics {
  
                  mappingFileUploadEnabled true
              }
  
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
  </code></pre>
  <p>Also,using</p>
  <pre><code>    apply plugin: 'com.android.application'
      
         apply plugin: 'com.google.gms.google-services'
      
         // Apply the Crashlytics Gradle plugin
      
         apply plugin: 'com.google.firebase.crashlytics'
      
          implementation 'com.google.firebase:firebase-auth:20.0.1'
          implementation 'com.google.firebase:firebase-firestore:22.0.1'
          implementation 'com.google.firebase:firebase-core:18.0.0'
      
          //the Firebase SDK for Google Analytics.
          implementation 'com.google.firebase:firebase-analytics:18.0.0'
      
          //the Firebase Crashlytics SDK.
          implementation 'com.google.firebase:firebase-crashlytics:17.3.0'
  </code></pre>
  <p>and,</p>
  <pre><code>        classpath 'com.google.gms:google-services:4.3.4'  // Google Services plugin
  
          // Add the Crashlytics Gradle plugin.
          classpath 'com.google.firebase:firebase-crashlytics-gradle:2.4.1'
  </code></pre>
  <p>Anyone facing the same issue?
  I tried clearing gradle cache and removing crashlytics dependencies as i read that it will be automatically handled by Android Studio,but crashes are not recorded then.</p>
  <p><strong>Iam using Android Studio 4.1.1(upgraded from previous version)</strong></p>
  <blockquote>
  <p>Build #AI-201.8743.12.41.6953283, built on November 5, 2020 Runtime
  version: 1.8.0_242-release-1644-b3-6222593 amd64 VM: OpenJDK 64-Bit
  Server VM by JetBrains s.r.o Linux 5.4.0-58-generic GC: ParNew,
  ConcurrentMarkSweep Memory: 1246M Cores: 4 Registry:
  ide.new.welcome.screen.force=true,
  external.system.auto.import.disabled=true Non-Bundled Plugins:
  com.android.tool.sizereduction.plugin Current Desktop: ubuntu:GNOME.</p>
  </blockquote>