Execution failed for task ':fluttertoast:compileDebugKotlin'. after flutter upgrade

**Error after running flutter upgrade error even after migrating the project **

A problem occurred evaluating project ':app'.

Plugin with id 'kotlin-android' not found.

app level build.gradle below

def localProperties = new Properties() def localPropertiesFile = rootProject.file('local.properties') if (localPropertiesFile.exists()) {
        localPropertiesFile.withReader('UTF-8') { reader ->
            localProperties.load(reader)
        } }
    
def flutterRoot = localProperties.getProperty('flutter.sdk') if (flutterRoot == null) {
    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.") }

def flutterVersionCode = localProperties.getProperty('flutter.versionCode') if (flutterVersionCode == null) {
    flutterVersionCode = '1' }

def flutterVersionName = localProperties.getProperty('flutter.versionName') if (flutterVersionName == null) {
    flutterVersionName = '1.0' }

apply plugin: 'com.android.application' apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle" apply plugin: 'com.google.gms.google-services'

android {
    compileSdkVersion 30

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.garvita.phonesoft"
        minSdkVersion 21
        targetSdkVersion 30
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.debug
        }
    } }

flutter {
    source '../..' }


One or more plugins require a higher Android SDK version.
Fix this issue by adding the following to C:\Users\AdarshSingh\StudioProjects\phonesoft\android\app\build.gradle:
android {
  compileSdkVersion 31
  ...
}


FAILURE: Build failed with an exception.

**

    * What went wrong: Execution failed for task ':fluttertoast:compileDebugKotlin'.
    > Compilation error. See log for more details
    * 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 
    ┌─ Flutter Fix ────────────────────────────────────────────────────────────────────────────────┐ │ [!] Your project requires a newer version of the Kotlin Gradle plugin.                       │ │ Find the latest version on  then │ │ update C:\Users\AdarshSingh\StudioProjects\phonesoft\android\build.gradle:    │ │ ext.kotlin_version = '<latest-version>'                            │ └──────────────────────────────────────────────────────────────────────────────────────────────┘ Exception: Gradle task assembleDebug failed with exit code 1

Nothing is working can anyone please give a solution or should i rollback to previous version of flutter