Trying to run the chapter 2 code gives error

[esoinila]

Improperly formatted define flag: Blocs

FAILURE: Build failed with an exception.

• Where:
  Script '/Users/a35850/development/flutter/packages/flutter_tools/gradle/flutter.gradle' line: 1035

• What went wrong:
  Execution failed for task ':app:compileFlutterBuildDebug'.

Process 'command '/Users/a35850/development/flutter/bin/flutter'' finished with non-zero exit value 1

• 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 1s
Exception: Gradle task assembleDebug failed with exit code 1

[esoinila]

"run fvm flutter create ." in the directory and changed the directory name to be lovercase fixed it for me.