Can't build projects with Local Notification plugin

I am using the native local notification plugin, after installing i cannot run any of my projects:

> cordova run android
ANDROID_HOME=C:\Users\Thomas\AppData\Local\Android\sdk
JAVA_HOME=C:\Program Files\java\jdk1.8.0_144
Subproject Path: CordovaLib


[17:56:04]  lint finished in 7.44 s
The Task.leftShift(Closure) method has been deprecated and is scheduled to be removed in Gradle 5.0. Please use Task.doLast(Action) instead.

        at build_bm7026xymjq1nxhxtcrn6p6er.run(C:\Users\Thomas\mobiledevelopment\feederhorgasz\platforms\android\build.gradle:141)
The JavaCompile.setDependencyCacheDir() method has been deprecated and is scheduled to be removed in Gradle 4.0.

Incremental java compilation is an incubating feature.

The TaskInputs.source(Object) method has been deprecated and is scheduled to be removed in Gradle 4.0. Please use TaskInputs.file(Object).skipWhenEmpty() instead.

:preBuild
UP-TO-DATE
:preDebugBuild

UP-TO-DATE
:checkDebugManifest

:preReleaseBuild
 UP-TO-DATE
:CordovaLib:preBuild UP-TO-DATE
:CordovaLib:preDebugBuild
 UP-TO-DATE
:CordovaLib:checkDebugManifest

:CordovaLib:prepareDebugDependencies

:CordovaLib:compileDebugAidl

:CordovaLib:compileDebugNdk

UP-TO-DATE
:CordovaLib:compileLint

:CordovaLib:copyDebugLint
 UP-TO-DATE

:CordovaLib:mergeDebugShaders

:CordovaLib:compileDebugShaders

:CordovaLib:generateDebugAssets
:CordovaLib:mergeDebugAssets

:CordovaLib:mergeDebugProguardFiles
 UP-TO-DATE
:CordovaLib:packageDebugRenderscript

UP-TO-DATE
:CordovaLib:compileDebugRenderscript

:CordovaLib:generateDebugResValues

:CordovaLib:generateDebugResources
:CordovaLib:packageDebugResources

:CordovaLib:processDebugManifest

:CordovaLib:generateDebugBuildConfig

:CordovaLib:processDebugResources

:CordovaLib:generateDebugSources
:CordovaLib:incrementalDebugJavaCompilationSafeguard

:CordovaLib:compileDebugJavaWithJavac

:CordovaLib:compileDebugJavaWithJavac - is not incremental (e.g. outputs have changed, no previous execution, etc.).
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
:CordovaLib:processDebugJavaRes

UP-TO-DATE
:CordovaLib:transformResourcesWithMergeJavaResForDebug

:CordovaLib:transformClassesAndResourcesWithSyncLibJarsForDebug

:CordovaLib:mergeDebugJniLibFolders

:CordovaLib:transformNative_libsWithMergeJniLibsForDebug

:CordovaLib:transformNative_libsWithSyncJniLibsForDebug

:CordovaLib:bundleDebug

:CordovaLib:preReleaseBuild UP-TO-DATE
:CordovaLib:checkReleaseManifest
:CordovaLib:prepareReleaseDependencies
:CordovaLib:compileReleaseAidl

:CordovaLib:compileReleaseNdk

UP-TO-DATE
:CordovaLib:copyReleaseLint UP-TO-DATE
:CordovaLib:mergeReleaseShaders

:CordovaLib:compileReleaseShaders

:CordovaLib:generateReleaseAssets

:CordovaLib:mergeReleaseAssets

:CordovaLib:mergeReleaseProguardFiles
 UP-TO-DATE
:CordovaLib:packageReleaseRenderscript UP-TO-DATE
:CordovaLib:compileReleaseRenderscript

:CordovaLib:generateReleaseResValues

:CordovaLib:generateReleaseResources
:CordovaLib:packageReleaseResources

:CordovaLib:processReleaseManifest

:CordovaLib:generateReleaseBuildConfig

:CordovaLib:processReleaseResources

:CordovaLib:generateReleaseSources
:CordovaLib:incrementalReleaseJavaCompilationSafeguard

:CordovaLib:compileReleaseJavaWithJavac

:CordovaLib:compileReleaseJavaWithJavac - is not incremental (e.g. outputs have changed, no previous execution, etc.).
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
:CordovaLib:processReleaseJavaRes

UP-TO-DATE
:CordovaLib:transformResourcesWithMergeJavaResForRelease

:CordovaLib:transformClassesAndResourcesWithSyncLibJarsForRelease

:CordovaLib:mergeReleaseJniLibFolders

:CordovaLib:transformNative_libsWithMergeJniLibsForRelease

:CordovaLib:transformNative_libsWithSyncJniLibsForRelease

:CordovaLib:bundleRelease

:prepareAndroidArchLifecycleRuntime100Library

:prepareComAndroidSupportCustomtabs2330Library

:prepareComAndroidSupportSupportCompat2610Library

:prepareComAndroidSupportSupportCoreUi2610Library

:prepareComAndroidSupportSupportCoreUtils2610Library

:prepareComAndroidSupportSupportFragment2610Library

:prepareComAndroidSupportSupportMediaCompat2610Library

:prepareComAndroidSupportSupportV42610Library

:prepareMeLeolinShortcutBadger1119Library

:prepareOrgApacheCordovaCordovaLib623DebugLibrary

:prepareDebugDependencies
:compileDebugAidl

:compileDebugRenderscript

:generateDebugBuildConfig

:generateDebugResValues
:generateDebugResources
:mergeDebugResources

:processDebugManifest

:processDebugResources

:generateDebugSources
:incrementalDebugJavaCompilationSafeguard
:compileDebugJavaWithJavac

:compileDebugJavaWithJavac - is not incremental (e.g. outputs have changed, no previous execution, etc.).
C:\Users\Thomas\mobiledevelopment\feederhorgasz\platforms\android\src\de\appplant\cordova\plugin\notification\Manager.java:25: error: cannot find symbol
import android.app.NotificationChannel;
                  ^
  symbol:   class NotificationChannel
  location: package android.app
C:\Users\Thomas\mobiledevelopment\feederhorgasz\platforms\android\src\de\appplant\cordova\plugin\notification\Manager.java:43: error: cannot find symbol

import static android.os.Build.VERSION_CODES.O;
^
  symbol:   static O
  location: class
C:\Users\Thomas\mobiledevelopment\feederhorgasz\platforms\android\src\de\appplant\cordova\plugin\notification\Manager.java:112: error: cannot find symbol
        if (SDK_INT < O)
                      ^

  symbol:   variable O
  location: class Manager
C:\Users\Thomas\mobiledevelopment\feederhorgasz\platforms\android\src\de\appplant\cordova\plugin\notification\Manager.java:115: error: cannot find symbol
        NotificationChannel channel = mgr.getNotificationChannel(CHANNEL_ID);
        ^
  symbol:   class NotificationChannel
  location: class Manager
C:\Users\Thomas\mobiledevelopment\feederhorgasz\platforms\android\src\de\appplant\cordova\plugin\notification\Manager.java:115: error: cannot find symbol
        NotificationChannel channel = mgr.getNotificationChannel(CHANNEL_ID);
                                         ^
  symbol:   method getNotificationChannel(String)
  location: variable mgr of type NotificationManager
C:\Users\Thomas\mobiledevelopment\feederhorgasz\platforms\android\src\de\appplant\cordova\plugin\notification\Manager.java:120: error: cannot find symbol
        channel = new NotificationChannel(
                      ^
  symbol:   class NotificationChannel
  location: class Manager
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
:compileDebugJavaWithJavac FAILED
6 errors

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.

BUILD FAILED

Total time: 25.946 secs
Error: cmd: Command failed with exit code 1 Error output:
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
C:\Users\Thomas\mobiledevelopment\feederhorgasz\platforms\android\src\de\appplant\cordova\plugin\notification\Manager.java:25: error: cannot find symbol
import android.app.NotificationChannel;
                  ^
  symbol:   class NotificationChannel
  location: package android.app
C:\Users\Thomas\mobiledevelopment\feederhorgasz\platforms\android\src\de\appplant\cordova\plugin\notification\Manager.java:43: error: cannot find symbol
import static android.os.Build.VERSION_CODES.O;
^
  symbol:   static O
  location: class
C:\Users\Thomas\mobiledevelopment\feederhorgasz\platforms\android\src\de\appplant\cordova\plugin\notification\Manager.java:112: error: cannot find symbol
        if (SDK_INT < O)
                      ^
  symbol:   variable O
  location: class Manager
C:\Users\Thomas\mobiledevelopment\feederhorgasz\platforms\android\src\de\appplant\cordova\plugin\notification\Manager.java:115: error: cannot find symbol
        NotificationChannel channel = mgr.getNotificationChannel(CHANNEL_ID);
        ^
  symbol:   class NotificationChannel
  location: class Manager
C:\Users\Thomas\mobiledevelopment\feederhorgasz\platforms\android\src\de\appplant\cordova\plugin\notification\Manager.java:115: error: cannot find symbol
        NotificationChannel channel = mgr.getNotificationChannel(CHANNEL_ID);
                                         ^
  symbol:   method getNotificationChannel(String)
  location: variable mgr of type NotificationManager
C:\Users\Thomas\mobiledevelopment\feederhorgasz\platforms\android\src\de\appplant\cordova\plugin\notification\Manager.java:120: error: cannot find symbol
        channel = new NotificationChannel(
                      ^
  symbol:   class NotificationChannel
  location: class Manager
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
6 errors

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.

[ERROR] An error occurred while running cordova run android (exit code 1).

I guess the problem is related to the android sdk. i installed the newest version too, so now i have 25 and 26 in my android folder, but same results.

nobody has a suggestion :frowning: ?

What is your ionic info output?
What does ionic cordova requirements return?

cli packages: (C:\Users\Thomas\AppData\Roaming\npm\node_modules)

@ionic/cli-utils  : 1.19.0
ionic (Ionic CLI) : 3.19.0

global packages:

cordova (Cordova CLI) : 7.0.1

local packages:

@ionic/app-scripts : 3.0.0
Cordova Platforms  : android 6.2.3 ios 4.4.0
Ionic Framework    : ionic-angular 3.7.1

System:

Node : v6.11.3
npm  : 5.6.0
OS   : Windows 10

Environment Variables:

ANDROID_HOME : not set

Misc:

backend : pro

Requirements check results for android:
Java JDK: installed 1.8.0
Android SDK: installed true
Android target: installed android-26,android-25
Gradle: installed C:\Program Files\Android\Android Studio\gradle\gradle-3.2\bin\gradle

Requirements check results for ios:
Apple OS X: not installed
Cordova tooling for iOS requires Apple OS X
Error: Some of requirements check failed

Current version is 8.0.0.

Current versions are 7.0.0 and 4.5.4 I think.

Install the current standalone from https://gradle.org/install/