You uploaded an APK or Android App Bundle which has an activity, activity alias, service or broadcast receiver with intent filter, but without ‘android:exported’ property set. This file can’t be installed on Android 12 or higher. See: developer.android.com/about/versions/12/behavior-changes-12#exported

//Taken from Cross Platform Native Plugins : Essential Kit (http://u3d.as/1szE)
#if UNITY_EDITOR && UNITY_ANDROID
using System.IO;
using System.Text;
using System.Xml;
using UnityEditor.Android;

//Reference : https://github.com/Over17/UnityAndroidManifestCallback
namespace VoxelBusters.EssentialKit.Editor.Android
{
public class AndroidManifestPostProcessor : IPostGenerateGradleAndroidProject
{
public void OnPostGenerateGradleAndroidProject(string basePath)
{
AndroidManifest androidManifest = new AndroidManifest(GetManifestPath(basePath));

//For forcing android hardwareAccelerated flag
androidManifest.SetApplicationAttribute(“hardwareAccelerated”, “true”);
androidManifest.SetStartingActivityAttribute(“hardwareAccelerated”, “true”);

//For forcing debuggable flag
androidManifest.SetApplicationAttribute(“debuggable”, UnityEditor.EditorUserBuildSettings.development ? “true” : “false”);

// For API 31+ support (Need explicit exported flag for entries having intent-filter tags)
androidManifest.SetStartingActivityAttribute(“exported”, “true”);

androidManifest.Save();
}

public int callbackOrder { get { return 1; } }

private string _manifestFilePath;

private string GetManifestPath(string basePath)
{
if (string.IsNullOrEmpty(_manifestFilePath))
{
StringBuilder pathBuilder = new StringBuilder(basePath);
pathBuilder.Append(Path.DirectorySeparatorChar).Append(“src”);
pathBuilder.Append(Path.DirectorySeparatorChar).Append(“main”);
pathBuilder.Append(Path.DirectorySeparatorChar).Append(“AndroidManifest.xml”);
_manifestFilePath = pathBuilder.ToString();
}
return _manifestFilePath;
}
}

internal class AndroidXmlDocument : XmlDocument
{
private string m_Path;
protected XmlNamespaceManager nsMgr;
public readonly string AndroidXmlNamespace = “http://schemas.android.com/apk/res/android”;
public AndroidXmlDocument(string path)
{
m_Path = path;
using (var reader = new XmlTextReader(m_Path))
{
reader.Read();
Load(reader);
}
nsMgr = new XmlNamespaceManager(NameTable);
nsMgr.AddNamespace(“android”, AndroidXmlNamespace);
}

public string Save()
{
return SaveAs(m_Path);
}

public string SaveAs(string path)
{
using (var writer = new XmlTextWriter(path, new UTF8Encoding(false)))
{
writer.Formatting = Formatting.Indented;
Save(writer);
}
return path;
}
}

internal class AndroidManifest : AndroidXmlDocument
{
private readonly XmlElement ApplicationElement;

public AndroidManifest(string path) : base(path)
{
ApplicationElement = SelectSingleNode(“/manifest/application”) as XmlElement;
}

private XmlAttribute CreateAndroidAttribute(string key, string value)
{
XmlAttribute attr = CreateAttribute(“android”, key, AndroidXmlNamespace);
attr.Value = value;
return attr;
}

internal XmlNode GetActivityWithLaunchIntent()
{
return SelectSingleNode(“/manifest/application/activity[intent-filter/action/@android:name=’android.intent.action.MAIN’ and ” +
“intent-filter/category/@android:name=’android.intent.category.LAUNCHER’]”, nsMgr);
}

internal void SetApplicationTheme(string appTheme)
{
ApplicationElement.Attributes.Append(CreateAndroidAttribute(“theme”, appTheme));
}

internal void SetStartingActivityName(string activityName)
{
GetActivityWithLaunchIntent().Attributes.Append(CreateAndroidAttribute(“name”, activityName));
}

internal void SetApplicationAttribute(string key, string value)
{
ApplicationElement.Attributes.Append(CreateAndroidAttribute(key, value));
}

internal void SetStartingActivityAttribute(string key, string value)
{
XmlNode node = GetActivityWithLaunchIntent();
if (node != null)
{
XmlAttributeCollection attributes = node.Attributes;
attributes.Append(CreateAndroidAttribute(key, value));
}
}
}
}
#endif