title: Flutter Issue | Keystore file not set for signing config release
body: <p>Running the command <code>flutter build appbundle --release</code> or <code>flutter build apk --release</code>
  I have this issue</p>
  <blockquote>
  <p>Keystore file not set for signing config release</p>
  </blockquote>
  <p>I'd follow the steps of the flutter.dev/docs: <a href="https://flutter.dev/docs/deployment/android#configure-signing-in-gradle" rel="noreferrer">https://flutter.dev/docs/deployment/android#configure-signing-in-gradle</a> but still the same.</p>
  <p>I create the key.propeties file and replace the content in the build.grade file.</p>
  <p><a href="https://i.stack.imgur.com/Zp4dh.png" rel="noreferrer">Build.gradle</a></p>
  <p><a href="https://i.stack.imgur.com/YGNPp.png" rel="noreferrer">Key.properties</a></p>
  <p>Also replace de build types with:</p>
  <pre><code>signingConfigs {
         release {
             keyAlias keystoreProperties['keyAlias']
             keyPassword keystoreProperties['keyPassword']
             storeFile keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
             storePassword keystoreProperties['storePassword']
         }
     }
     buildTypes {
         release {
             signingConfig signingConfigs.release
         }
     }
  </code></pre>
  <p>But still getting the same issue:</p>
  <ul>
  <li>What went wrong:
  Execution failed for task ':app:validateSigningRelease'.</li>
  </ul>
  <blockquote>
  <p>Keystore file not set for signing config release</p>
  </blockquote>
  <p>Somebody already solve this issue?</p>