AAPT: error: ” is incompatible with attribute allowBackup (attr) boolean

  android, android-activity, php

this is my code
with the following error how can i fix it ??
(AAPT: error: ” is incompatible with attribute allowBackup (attr) boolean.)
and i have message that say (files under the "build" folder are generated and should not be edited)

xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.brokersystem"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="16"
    android:targetSdkVersion="30" />

<uses-permission android:name="android.permission.INTERNET" />

<application
    android:allowBackup=""
    android:appComponentFactory="androidx.core.app.CoreComponentFactory"
    android:debuggable="true"
    android:fullBackupContent="@xml/backup_descriptor"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:testOnly="true"
    android:theme="@style/Theme.BrokerSystem" >
    <activity android:name="com.example.brokersystem.completTrans" />
    <activity
        android:name="com.example.brokersystem.terms1"
        android:label="@string/title_activity_terms1"
        android:theme="@style/Theme.BrokerSystem.NoActionBar" />
    <activity android:name="com.example.brokersystem.forgPass" />
    <activity android:name="com.example.brokersystem.singUp" />
    <activity android:name="com.example.brokersystem.welcom" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />"
        </intent-filter>
    </activity>
    <activity android:name="com.example.brokersystem.MainActivity" />
</application>

</manifest

Blockquote

Source: Ask PHP

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