Android crash with 'Provider must grant uri permissions'.

Hi all.
I’ve successfully built an Android app (Unity 2019.4) but It crashes instantly when deployed to my old Galaxy S8.

Logcat reveals this:

‘Error AndroidRuntime java.lang.RuntimeException: Unable to get provider android.support.v4.content.FileProvider: java.lang.SecurityException: Provider must grant uri permissions’.

Manifest is as follows:

<?xml version="1.0" encoding="utf-8"?>
<!--PDFReader-->
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.IndieYP.PDFReader"
    android:versionCode="1"
      android:versionName="1.0">
      <uses-sdk android:minSdkVersion="9" />
      <application android:label="@string/app_name"
        android:icon="@drawable/app_icon">
    <activity android:name="com.unity3d.player.UnityPlayerActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
            <meta-data android:name="unityplayer.UnityActivity" android:value="true" />
            <meta-data android:name="unityplayer.ForwardNativeEventsToDalvik" android:value="false" />
    </activity>
    <activity android:name="com.SlavaObninsk.pdfreader.Logic"
             android:label="@string/app_name"
             android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen">
    </activity>
    <activity
            android:name="com.SlavaObninsk.pdfreader.WebviewActivity">
    </activity>
       
    <provider
            android:name="android.support.v4.content.FileProvider"
            android:authorities="com.IndieYP.PDFReader.provider"
            android:exported="false">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/provider_paths"/>
        </provider>
  </application>
  <uses-permission android:name="android.permission.INTERNET" />
  <!--/PDFReader-->
</manifest>

I think the PDF reader plugin is the culprit. I was removed from my project a while back so no sure why I’ts still there.

Can anybody help me resolve this?

Would really appreciate some help on this guys. Anybody?