Android "mainMergedManifest" does not exist

I am having a build issue with the following error code:

A problem was found with the configuration of task ':app:processDebugManifest' (type 'ProcessMultiApkApplicationManifest').

File 'E:\DK\app\build\intermediates\merged_manifest\debug\out\AndroidManifest.xml' specified for property 'mainMergedManifest' does not exist.

build.gradle

apply plugin: 'com.android.application'
android {
compileSdkVersion 29
buildToolsVersion "29.0.2"
defaultConfig {
    applicationId "com.example.sample"
    minSdkVersion 21
    targetSdkVersion 29
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
    }
}

compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
}
}

dependencies {
// Import the BoM for the Firebase platform
implementation platform('com.google.firebase:firebase-bom:26.1.0')

// Declare the dependency for the Firebase Authentication library
// When using the BoM, you don't specify versions in Firebase library dependencies
implementation 'com.google.firebase:firebase-auth'

implementation 'com.google.android.material:material:1.2.1'

implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'androidx.appcompat:appcompat:1.2.0'
implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
implementation 'com.google.firebase:firebase-auth:16.0.5'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test.ext:junit:1.1.2'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
implementation 'com.google.firebase:firebase-database:19.5.1'
implementation 'com.google.firebase:firebase-storage:19.2.0'
implementation 'com.github.bumptech.glide:glide:4.11.0'
implementation 'com.google.gms:google-services:4.3.4'
    implementation 'androidx.browser:browser:1.2.0'
}
apply plugin: 'com.google.gms.google-services'

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.sample">
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

<application
    android:allowBackup="true"
    android:icon="@drawable/logo"
    android:label="@string/app_name"

    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity
        android:name=".Activities.SplashActivity"
        android:theme="@style/AppTheme.Launcher"
        android:windowSoftInputMode="adjustPan"
        android:screenOrientation="portrait"
        android:configChanges="orientation">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <action android:name="android.intent.action.VIEW" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity android:name=".Activities.LoginActivity"
        android:screenOrientation="portrait"
        android:configChanges="orientation"/>
    <activity android:name=".Activities.MainActivity"
        android:windowSoftInputMode="adjustPan"
        android:screenOrientation="portrait"
        android:configChanges="orientation"/>
    <activity android:name=".Activities.SignUpActivity"
        android:screenOrientation="portrait"
        android:configChanges="orientation"/>
    <activity android:name=".Activities.DebugActivity"
        android:screenOrientation="portrait"
        android:configChanges="orientation"/>
</application>

I am new to this and I can't seem to figure out what the issue may be. We are working on an application together and noone seems to know the issue. We are beginners, with little to no experience.