title: Android Studio showing error like "Expected a name but was STRING at line 1 column 99 path $[0].apkInfo.versionName" while generating signed apk
body: <p>I am trying to generate signed apk of my application but this is showing error </p>
  
  <blockquote>
    <p>Expected a name but was STRING at line 1 column 99 path $[0].apkInfo.versionName</p>
  </blockquote>
  
  <p>Project Level gradle is:</p>
  
  <pre><code>buildscript {
  repositories {
  
      jcenter()
      google()
  }
  dependencies {
      classpath 'com.android.tools.build:gradle:3.0.1'
  
      // NOTE: Do not place your application dependencies here; they belong
      // in the individual module build.gradle files
  }
  }
  
  allprojects {
  repositories {
      maven { url "https://oss.sonatype.org/content/repositories/snapshots/" }
      mavenCentral()
      jcenter()
      google()
  }
  }
  
  task clean(type: Delete) {
  delete rootProject.buildDir
  }
  </code></pre>
  
  <p>App level gradle is:</p>
  
  <pre><code>apply plugin: 'com.android.application'
  android {
  compileSdkVersion 25
  defaultConfig {
      applicationId "com.roosterlogic.smartpaani.smartpaanimaintenance"
      minSdkVersion 14
      targetSdkVersion 25
      versionCode 5
      versionName "2.3"
  }
  buildTypes {
      release {
          minifyEnabled false
          proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
      }
  }
  }
  dependencies {
  implementation fileTree(dir: 'libs', include: ['*.jar'])
  implementation 'com.android.support:appcompat-v7:25.1.1'
  implementation 'com.android.support:design:25.1.1'
  implementation 'com.squareup.retrofit2:retrofit:2.2.0'
  implementation 'com.squareup.retrofit2:converter-gson:2.2.0'
  
  implementation 'com.michaelpardo:activeandroid:3.1.0-SNAPSHOT'
  implementation 'com.google.android.gms:play-services-location:10.2.1'
  implementation 'com.google.code.gson:gson:2.7'
  implementation 'com.android.support:support-v4:25.1.1'
  implementation 'com.android.support.constraint:constraint-layout:1.0.2'
  implementation 'com.squareup.picasso:picasso:2.5.2'
  
  implementation 'id.zelory:compressor:2.1.0'
  }
  </code></pre>
  
  <p>Android Studio 3.1
  While upgrading I have shifted to gradle 3.1.1 but now I step down at 3.0.1.</p>
  
  <p>What is problem behind this help.</p>