Android name space error in building and running in emulator or any real device

# Trying to run application bu it display the name space error already tried with using bundle id and upgrading AGP version.

`Namespace not specified. Please specify a namespace in the module's build.gradle file like so:

android {
    namespace 'com.example.namespace'
}

If the package attribute is specified in the source AndroidManifest.xml, it can be migrated automatically to the namespace value in the build.gradle file using the AGP Upgrade Assistant; please refer to https://developer.android.com/studio/build/agp-upgrade-assistant for more information.
`

Tried to upgrading and downgrading sdk versions

 defaultConfig {
        applicationId "com.example.namespace"
        minSdkVersion 21
        targetSdkVersion 32
        versionCode 2
        versionName "1.1"
        multiDexEnabled true
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

plugins {
    id 'com.android.application'
    id 'com.google.firebase.crashlytics'
//    id 'com.android.application' version '8.0.3'
//    id 'kotlin-android'
//    id 'kotlin-android-extensions'
//    id 'kotlin-kapt'
}
//apply plugin: 'com.google.gms.google-services'

Add namespace to your module's build.gradle:

android {
    namespace = "your.namespace.here" // Add your namespace here
    compileSdk = 32

    /* Your default config */
    defaultConfig {
        applicationId "com.your.applicationId"
        minSdkVersion 21
        targetSdkVersion 32
        versionCode 2
        versionName "1.1"
        multiDexEnabled true
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    // Others
}