Namespace not specified

With this setup:

[✓] Flutter (Channel stable, 3.32.1, on macOS 15.5 24F74 darwin-arm64, locale en-MX)
[✓] Android toolchain - develop for Android devices (Android SDK version 35.0.1)
[✓] Xcode - develop for iOS and macOS (Xcode 16.4)
[✓] Android Studio (version 2024.3)
[✓] VS Code (version 1.100.3)
[✓] Connected device (1 available)
[✓] Network resources

When install de plugin flutter_plugin_qpos: ^0.3.1 and compile the app, shows the next error:

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring project ':flutter_plugin_qpos'.
> Could not create an instance of type com.android.build.api.variant.impl.LibraryVariantBuilderImpl.
   > Namespace not specified. Specify a namespace in the module's build file: /Users/emiliano/.pub-cache/hosted/pub.dev/flutter_plugin_qpos-0.3.1/android/build.gradle. See https://d.android.com/r/tools/upgrade-assistant/set-namespace for information about setting the namespace.

     If you've specified the package attribute in the source AndroidManifest.xml, you can use the AGP Upgrade Assistant to migrate to the namespace value in the build file. Refer to https://d.android.com/r/tools/upgrade-assistant/agp-upgrade-assistant for general information about using the AGP Upgrade Assistant.

* 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 https://help.gradle.org.

BUILD FAILED in 37s
Error: Gradle task assembleDebug failed with exit code 1

It is necessary to add the namespace in the plugin's build.gradle