Deploy error - Push Notification Function

Hello

We want to implement Push Notification function on app, i try create dummy project to test the function. i have firebase account and already download the json file, But when i try deploy the app this error came out. I use Windev Mobile 24

Failure creating the Android application named <D:\Hafizh - Windev\Project Windev 24\FirebaseExercise\Exe\FirebaseExercise.apk>.


Command line: "C:\Program Files\Java\jdk-10.0.2\bin\java.exe" -Duser.dir="D:\Hafizh - Windev\Project Windev 24\FirebaseExercise\Android\Gen" "-Dorg.gradle.appname=D:\Hafizh - Windev\Project Windev 24\FirebaseExercise\Android\Gen" -classpath "D:\Program Files\PC SOFT\WINDEV Mobile 24\Personal\Android\Gradle\lib\gradle-launcher-4.4.1.jar" org.gradle.launcher.GradleMain assembleDebug -b "D:\Hafizh - Windev\Project Windev 24\FirebaseExercise\Android\Gen\build.gradle"


Error returned:
:compileDebugJavaWithJavacD:\Hafizh - Windev\Project Windev 24\FirebaseExercise\Android\Gen\src\com\mycompany\firebaseexercise\wdgen\GWDFHome.java:140: error: cannot find symbol
WDAPINotificationPush.notifPushProcedure((new WDChaineU("Home.callNotif")));
^
  symbol:   variable WDAPINotificationPush
  location: class GWDFHome.GWDButton1
D:\Hafizh - Windev\Project Windev 24\FirebaseExercise\Android\Gen\src\com\mycompany\firebaseexercise\wdgen\GWDFHome.java:176: error: cannot find symbol
vWD_MyNotif = WDParametre.traiterParametreClasse(vWD_MyNotif, 1, false, WDNotification.class, 111);
                                                                        ^
  symbol:   class WDNotification
  location: class GWDFHome
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
2 errors
 FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at [help.gradle.org]

BUILD FAILED in 1s
16 actionable tasks: 6 executed, 10 up-to-date

any ideato fix this problem?

Best Regard,
Hafizh