Issue when attempting to run the project - error message below

[Maxwh21]

/C:/Users/MaxW/AppData/Local/Pub/Cache/hosted/pub.dev/fluro-2.0.3/lib/src/fluro_router.dart:134:37: Error: The method 'copyWith' isn't defined for the class 'RouteSettings'.

• 'RouteSettings' is from 'package:flutter/src/widgets/navigator.dart' ('/C:/src/flutter/packages/flutter/lib/src/widgets/navigator.dart').
  Try correcting the name to the name of an existing method, or defining a method named 'copyWith'.
  settingsToUse = settingsToUse.copyWith(name: path);
  ^^^^^^^^
  Target kernel_snapshot failed: Exception

FAILURE: Build completed with 2 failures.

1: Task failed with an exception.

• Where:
  Script 'C:\src\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 1151

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

Process 'command 'C:\src\flutter\bin\flutter.bat'' 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.
==============================================================================

2: Task failed with an exception.

• What went wrong:
  java.lang.StackOverflowError (no error message)

• 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 28s
Exception: Gradle task assembleDebug failed with exit code 1

[Maxwh21]

This was resolved by me deleting the pubspec.lock file and clicking pub get on the pubspec.yaml file