CreateOpenChatActivity crashes with "channel id is empty" despite successful LineSDK.setup()

[hungbui1204]

Environment

• Platform: Android
• flutter_line_sdk version: [2.6.2]
• Flutter version: [3.29.3]
• Android SDK: [compileSdkVersion(36)/targetSdkVersion(36)]
• LINE Channel: Verified package name xx.xx.xx.myapp & SHA256 fingerprints match LINE Console

Current Behavior

I am sure that i run await LineSDK.instance.setup(AppConstants.lineLoginClientId) before run login() or anything
App crashes when launching CreateOpenChatActivity with stack trace from FB Crashlytics:

LineApiClientBuilder.<init>
java.lang.IllegalArgumentException - channel id is empty

Fatal Exception: java.lang.RuntimeException
Unable to start activity ComponentInfo{xx.xx.xx.myapp/com.linecorp.linesdk.openchat.ui.CreateOpenChatActivity}: java.lang.IllegalArgumentException: channel id is empty

          Fatal Exception: java.lang.RuntimeException: Unable to start activity ComponentInfo{xx.xx.xx.myapp/com.linecorp.linesdk.openchat.ui.CreateOpenChatActivity}: java.lang.IllegalArgumentException: channel id is empty
       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3645)
       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3782)
       at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:101)
       at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
       at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2307)
       at android.os.Handler.dispatchMessage(Handler.java:106)
       at android.os.Looper.loopOnce(Looper.java:201)
       at android.os.Looper.loop(Looper.java:288)
       at android.app.ActivityThread.main(ActivityThread.java:7872)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:936)

Caused by java.lang.IllegalArgumentException
channel id is empty

          Caused by java.lang.IllegalArgumentException: channel id is empty
       at com.linecorp.linesdk.api.LineApiClientBuilder.<init>(LineApiClientBuilder.java:42)
       at com.linecorp.linesdk.openchat.ui.CreateOpenChatActivity$lineApiClient$2.invoke(CreateOpenChatActivity.kt:30)
       at com.linecorp.linesdk.openchat.ui.CreateOpenChatActivity$lineApiClient$2.invoke(CreateOpenChatActivity.kt:28)
       at kotlin.SynchronizedLazyImpl.getValue(LazyJVM.kt:86)
       at com.linecorp.linesdk.openchat.ui.CreateOpenChatActivity.getLineApiClient(CreateOpenChatActivity.kt:28)
       at com.linecorp.linesdk.openchat.ui.CreateOpenChatActivity.access$getLineApiClient(CreateOpenChatActivity.kt:25)
       at com.linecorp.linesdk.openchat.ui.CreateOpenChatActivity$initViewModel$1.create(CreateOpenChatActivity.kt:59)
       at androidx.lifecycle.ViewModelProvider$Factory.create(ViewModelProvider.android.kt)
       at androidx.lifecycle.ViewModelProvider$Factory.create(ViewModelProvider.android.kt:158)
       at androidx.lifecycle.viewmodel.ViewModelProviderImpl_androidKt.createViewModel(ViewModelProviderImpl_android.kt:34)
       at androidx.lifecycle.viewmodel.ViewModelProviderImpl.getViewModel$lifecycle_viewmodel_release(ViewModelProviderImpl.java:65)
       at androidx.lifecycle.viewmodel.ViewModelProviderImpl.getViewModel$lifecycle_viewmodel_release$default(ViewModelProviderImpl.java:47)
       at androidx.lifecycle.ViewModelProvider.get(ViewModelProvider.java:91)
       at androidx.lifecycle.ViewModelProvider.get(ViewModelProvider.java:109)

       at com.linecorp.linesdk.openchat.ui.CreateOpenChatActivity.initViewModel(CreateOpenChatActivity.kt:54)
       at com.linecorp.linesdk.openchat.ui.CreateOpenChatActivity.onCreate(CreateOpenChatActivity.kt:42)
       at android.app.Activity.performCreate(Activity.java:8305)
       at android.app.Activity.performCreate(Activity.java:8284)
       at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1417)
       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3626)
       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3782)
       at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:101)
       at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
       at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2307)
       at android.os.Handler.dispatchMessage(Handler.java:106)
       at android.os.Looper.loopOnce(Looper.java:201)
       at android.os.Looper.loop(Looper.java:288)
       at android.app.ActivityThread.main(ActivityThread.java:7872)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:936)

Here is my outputs from fvm flutter doctor -v command

[✓] Flutter (Channel stable, 3.29.3, on macOS 26.2 25C56 darwin-arm64, locale en-VN) [290ms]
    • Flutter version 3.29.3 on channel stable at /Users/splus/fvm/versions/3.29.3
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision ea121f8859 (10 months ago), 2025-04-11 19:10:07 +0000
    • Engine revision cf56914b32
    • Dart version 3.7.2
    • DevTools version 2.42.3

[✓] Android toolchain - develop for Android devices (Android SDK version 36.0.0) [1,113ms]
    • Android SDK at /Users/splus/Library/Android/sdk
    • Platform android-36, build-tools 36.0.0
    • ANDROID_HOME = /Users/splus/Library/Android/sdk
    • Java binary at: /Library/Java/JavaVirtualMachines/jdk-17.jdk/Contents/Home/bin/java
      This JDK is specified in your Flutter configuration.
      To change the current JDK, run: `flutter config --jdk-dir="path/to/jdk"`.
    • Java version Java(TM) SE Runtime Environment (build 17.0.12+8-LTS-286)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 26.2) [577ms]
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 17C52
    • CocoaPods version 1.16.2

[✓] Chrome - develop for the web [34ms]
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2025.2) [34ms]
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 21.0.8+-14196175-b1038.72)

[✓] IntelliJ IDEA Ultimate Edition (version 2025.3) [33ms]
    • IntelliJ at /Applications/IntelliJ IDEA.app
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin version 500.0.0

[✓] VS Code (version 1.106.3) [7ms]
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.126.0

[✓] Connected device (6 available) [5.9s]

[✓] Network resources [1,138ms]
    • All expected network resources are available.

• No issues found!