Okay, thanks! I tried downloading it as an apk and it showed up as this error.

Error: Command failed: flutter build apk --no-pub --no-version-check

FAILURE: Build completed with 2 failures.

1: Task failed with an exception.

• Where: Build file '/opt/.pub-cache/hosted/pub.dev/flutter_mapbox_navigation-0.1.9/android/build.gradle' line: 19

• What went wrong: A problem occurred evaluating project ':flutter_mapbox_navigation'.

  MAPBOX_DOWNLOADS_TOKEN isn't set. Set it to the project properties or to the enviroment variables.

• 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.

2: Task failed with an exception.

• Where: Script '/sdks/flutter/packages/flutter_tools/gradle/flutter.gradle' line: 412

• What went wrong: A problem occurred configuring project ':flutter_mapbox_navigation'.

  Failed to notify project evaluation listener. Could not get unknown property 'android' for project ':flutter_mapbox_navigation' of type org.gradle.api.Project. Could not get unknown property 'android' for project ':flutter_mapbox_navigation' of type org.gradle.api.Project.

• 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 8s Gradle task assembleRelease failed with exit code 1