帮忙看一下，谢谢 No signature of method: build_6g6bynwz02a2yr2sdf6l7w3f.android() is applicable for argument types:

[kenton-7]

FAILURE: Build completed with 2 failures.

1: Task failed with an exception.

• Where:
  Build file '/Users/kentonwu/FreshPoi/flutter/.pub-cache/hosted/pub.flutter-io.cn/tobias-2.4.2/android/build.gradle' line: 30

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

No signature of method: build_6g6bynwz02a2yr2sdf6l7w3f.android() is applicable for argument types: (build_6g6bynwz02a2yr2sdf6l7w3f$_run_closure2) values: [build_6g6bynwz02a2yr2sdf6l7w3f$_run_closure2@396ccb5c]

• 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 '/Users/kentonwu/FreshPoi/flutter/packages/flutter_tools/gradle/flutter.gradle' line: 422

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

Failed to notify project evaluation listener.
Cannot invoke method substring() on null object
compileSdkVersion is not specified. Please add it to build.gradle

• 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.
  ==============================================================================