Error during construction


Hello, I receive this error when building my application.
I use the following command:
ionic cordova build android --prod --release

Error : Unable to find or load the main class Xmx2048M
(node:7644) UnhandledPromiseRejectionWarning: Error: cmd: Command failed with exit code 1
at ChildProcess.whenDone (C:\Users\LENOVO\io\test\test\platforms\android\cordova\node_modules\cordova-common\src\superspawn.js:169:23)
at emitTwo (events.js:126:13)
at ChildProcess.emit (events.js:214:7)
at maybeClose (internal/child_process.js:925:16)
at Process.ChildProcess._handle.onexit (internal/child_process.js:209:5)
(node:7644) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:7644) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

My sysmtem info:

cli packages: (C:**********\AppData\Roaming\npm\node_modules)

@ionic/cli-utils  : 1.19.2
ionic (Ionic CLI) : 3.20.0

global packages:

cordova (Cordova CLI) : not installed

local packages:

@ionic/app-scripts : 3.1.9
Cordova Platforms  : android 7.0.0 browser 5.0.3
Ionic Framework    : ionic-angular 3.9.2


Android SDK Tools : 26.1.1
Node              : v8.10.0
npm               : 5.6.0
OS                : Windows 10

Environment Variables:

ANDROID_HOME : C:\*********\AppData\Local\Android\Sdk