Gradle Errors : Loosing my mind please help i will do anything [Onesignal]

I have been having issues with plugin compatibility in my project while integrating one signal SDK:

Duplicate class android.support.customtabs.ICustomTabsCallback$Stub found in modules anroid-support-customtabs-23.3.0.jar (anroid-support-customtabs-23.3.0.jar) and classes.jar androidx.browser.browser-1.0.0
UnityEngine.GUIUtility rocessEvent(Int32, IntPtr)

One signal has a troubleshooting guide https://documentation.onesignal.com/docs/troubleshooting-unity which I have attempted to follow but with no success, Upon implementing their instructions I get an error

Plugin with id 'com.android.application' not found.

I suspect that maybe I am not editing the main template.grade file as required. I am completely out of my depth and have no technical knowledge in matters android.

below is my main Gradle template file:

Code (CSharp):

1. buildscript {
2.     repositories {
3.         maven { url 'https://plugins.gradle.org/m2/'}
4.     }
5.     dependencies {
6.         classpath 'gradle.plugin.com.onesignal:onesignal-gradle-plugin:[0.12.3, 0.99.99]'
7.     }
8. }
9. apply plugin: 'com.onesignal.androidsdk.onesignal-gradle-plugin'
10.  
11. repositories {
12.     maven { url 'https://maven.google.com' }
13. }
14.  
15. apply plugin: 'com.android.application'
16. **APPLY_PLUGINS**
17.  
18. dependencies {
19.     implementation fileTree(dir: 'libs', include: ['*.jar'])
20. **DEPS**}
21.  
22. android {
23.     compileSdkVersion **APIVERSION**
24.     buildToolsVersion '**BUILDTOOLS**'
25.  
26.     compileOptions {
27.         sourceCompatibility JavaVersion.VERSION_1_8
28.         targetCompatibility JavaVersion.VERSION_1_8
29.     }
30.  
31.     defaultConfig {
32.         minSdkVersion **MINSDKVERSION**
33.         targetSdkVersion **TARGETSDKVERSION**
34.         applicationId '**APPLICATIONID**'
35.         ndk {
36.             abiFilters **ABIFILTERS**
37.         }
38.         versionCode **VERSIONCODE**
39.         versionName '**VERSIONNAME**'
40.     }
41.  
42.     lintOptions {
43.         abortOnError false
44.     }
45.  
46.     aaptOptions {
47.         noCompress = ['.unity3d', '.ress', '.resource', '.obb'**STREAMING_ASSETS**]
48.         ignoreAssetsPattern = "!.svn:!.git:!.ds_store:!*.scc:.*:!CVS:!thumbs.db:!picasa.ini:!*~"
49.     }**SIGN**
50.  
51.     buildTypes {
52.         debug {
53.             minifyEnabled **MINIFY_DEBUG**
54.             useProguard **PROGUARD_DEBUG**
55.             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-unity.txt'**USER_PROGUARD****SIGNCONFIG**
56.             jniDebuggable true
57.         }
58.         release {
59.             minifyEnabled **MINIFY_RELEASE**
60.             useProguard **PROGUARD_RELEASE**
61.             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-unity.txt'**USER_PROGUARD****SIGNCONFIG**
62.         }
63.     }**PACKAGING_OPTIONS****SPLITS**
64. **BUILT_APK_LOCATION**
65. **EXTERNAL_SOURCES**
66.     bundle {
67.         language {
68.             enableSplit = false
69.         }
70.         density {
71.             enableSplit = false
72.         }
73.         abi {
74.             enableSplit = true
75.         }
76.     }
77. }**SPLITS_VERSION_CODE****REPOSITORIES****SOURCE_BUILD_SETUP**

I would appriciate any help in resolving this issue

 

Post a screenshot of Assets/Plugins/Android folder and mention what PlayServicesResolver version you have and its settings for android (screenshot).

 

Resolver version 1.2.124
Image link

 

Just search for "support" in your project once and pass me the screenshot. If you see any thing like "support-v4", just delete and build it again.

 

I too am facing same issue..
Did you fix it?

 

This happens only if you have duplicate libraries. Just find out and delete the duplicates.