Can't resolve './app.module.ngfactory'

[0077cc]

Short description of the problem:

Trying to deploy with the command:

$ ionic cordova build android --prod --release

But, I am getting this error:

Error: ./src/app/main.ts
Module not found: Error: Can't resolve './app.module.ngfactory' in '/Users/richard/Documents/Development/BTApp/src/app'
resolve './app.module.ngfactory' in '/Users/richard/Documents/Development/BTApp/src/app'
  using description file: /Users/richard/Documents/Development/BTApp/package.json (relative path: ./src/app)
    Field 'browser' doesn't contain a valid alias configuration
  after using description file: /Users/richard/Documents/Development/BTApp/package.json (relative path: ./src/app)
    using description file: /Users/richard/Documents/Development/BTApp/package.json (relative path: ./src/app/app.module.ngfactory)
      no extension
        Field 'browser' doesn't contain a valid alias configuration
        /Users/richard/Documents/Development/BTApp/src/app/app.module.ngfactory doesn't exist
      .ts
        Field 'browser' doesn't contain a valid alias configuration
        /Users/richard/Documents/Development/BTApp/src/app/app.module.ngfactory.ts doesn't exist
      .js
        Field 'browser' doesn't contain a valid alias configuration
        /Users/richard/Documents/Development/BTApp/src/app/app.module.ngfactory.js doesn't exist
      .json
        Field 'browser' doesn't contain a valid alias configuration
        /Users/richard/Documents/Development/BTApp/src/app/app.module.ngfactory.json doesn't exist
      as directory
        /Users/richard/Documents/Development/BTApp/src/app/app.module.ngfactory doesn't exist
[/Users/richard/Documents/Development/BTApp/src/app/app.module.ngfactory]
[/Users/richard/Documents/Development/BTApp/src/app/app.module.ngfactory.ts]
[/Users/richard/Documents/Development/BTApp/src/app/app.module.ngfactory.js]
[/Users/richard/Documents/Development/BTApp/src/app/app.module.ngfactory.json]
[/Users/richard/Documents/Development/BTApp/src/app/app.module.ngfactory]
 @ ./src/app/main.ts 2:0-60
    at new BuildError (/Users/richard/Documents/Development/BTApp/node_modules/@ionic/app-scripts/dist/util/errors.js:16:28)
    at callback (/Users/richard/Documents/Development/BTApp/node_modules/@ionic/app-scripts/dist/webpack.js:121:28)
    at emitRecords.err (/Users/richard/Documents/Development/BTApp/node_modules/webpack/lib/Compiler.js:269:13)
    at Compiler.emitRecords (/Users/richard/Documents/Development/BTApp/node_modules/webpack/lib/Compiler.js:375:38)
    at emitAssets.err (/Users/richard/Documents/Development/BTApp/node_modules/webpack/lib/Compiler.js:262:10)
    at applyPluginsAsyncSeries1.err (/Users/richard/Documents/Development/BTApp/node_modules/webpack/lib/Compiler.js:368:12)
    at next (/Users/richard/Documents/Development/BTApp/node_modules/tapable/lib/Tapable.js:218:11)
    at Compiler.compiler.plugin (/Users/richard/Documents/Development/BTApp/node_modules/webpack/lib/performance/SizeLimitsPlugin.js:99:4)
    at Compiler.applyPluginsAsyncSeries1 (/Users/richard/Documents/Development/BTApp/node_modules/tapable/lib/Tapable.js:222:13)
    at Compiler.afterEmit (/Users/richard/Documents/Development/BTApp/node_modules/webpack/lib/Compiler.js:365:9)

What behavior are you expecting?

I am trying to generate the 'android-release-unsigned.apk' file

Relevant info:

$ cordova requirements

Android Studio project detected
Requirements check results for android:
Java JDK: installed 1.8.0
Android SDK: installed true
Android target: installed android-27,android-26,android-24,android-23
Gradle: installed /Users/richard/.sdkman/candidates/gradle/4.4.1/bin/gradle

Which @ionic/app-scripts version are you using?

cli packages: (/usr/local/lib/node_modules)
    @ionic/cli-utils  : 1.19.0
    ionic (Ionic CLI) : 3.19.0
global packages:
    cordova (Cordova CLI) : 8.0.0 
local packages:
    @ionic/app-scripts : 3.1.2
    Cordova Platforms  : android 7.0.0
    Ionic Framework    : ionic-angular 3.9.2
System:
    Android SDK Tools : 26.1.1
    Node              : v8.9.3
    npm               : 5.5.1 
    OS                : macOS High Sierra
    Xcode             : Xcode 9.0 Build version 9A235 
Environment Variables:
    ANDROID_HOME : /Users/richard/Library/Android/sdk/
Misc:
    backend : pro

[mhartington]

Closing as resolved in slack.