Unknown error (code 1294 SQLITE_CANTOPEN_ENOENT[1294]): Could not open database

Programação
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#1

Tenho dois sistemas e suas classes de abertura/apresentação sao iguais, mas um dos apps esta dando problema somente nos androids 10 (API 29).Segue minha classe:

package br.com.premiumwebrep.UI;

import android.Manifest;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.StrictMode;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import br.com.premiumwebrep.DAO.BaseRepDAO;

@SuppressLint(“NewApi”)
public class Apresentacao extends Activity implements Runnable {

SQLiteDatabase db;
BaseRepDAO dao;
	
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
    int SDK_INT = android.os.Build.VERSION.SDK_INT;
    
    while(checkDiskPermission() != true) {
    	checkDiskPermission();
    } 
    if (SDK_INT > 8) 
    {
        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
                .permitAll().build();
        StrictMode.setThreadPolicy(policy);
        super.onCreate(savedInstanceState);
		setContentView(R.layout.apresentacao);
		Handler handler = new Handler();
		handler.postDelayed(this,2000);
		if(checkDiskPermission() == true) {
			dao = new BaseRepDAO(this);
			
			try {
				dao.getReadableDatabase();
			}catch(Exception e) {
				e.printStackTrace();
			}
			
			
			dao.close();
			}
						

    }else {
    	super.onCreate(savedInstanceState);
		setContentView(R.layout.apresentacao);
		Handler handler = new Handler();		
		handler.postDelayed(this, 2000);
		if(checkDiskPermission() == true) {
			dao = new BaseRepDAO(this);
			dao.getReadableDatabase();
			dao.close();
			}
    }
    
	
}

private boolean checkDiskPermission ()
{
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
        return false;
    }
    return true;
}

public void run() {
	dao = new BaseRepDAO(this);
	dao.getReadableDatabase();			
	dao.close();
	
	BaseRepDAO.criaCampos();		
	
	db = SQLiteDatabase.openDatabase(Environment.getExternalStorageDirectory() + "/PremiumWeb/"
			+ "PREMIUMWEBREP.DB", null, SQLiteDatabase.OPEN_READONLY);
	
	Cursor cursor = db.rawQuery("select * from empresa", null);
	
	int registros = cursor.getCount();
	
	if(registros != 0){
		
		startActivity(new Intent(this, LoginUsuario.class));
		finish();
	}else{
		
		startActivity(new Intent(this, LoginEmpresa.class));
		finish();
	}
	
	cursor.close();
	db.close();
}

}

Quando o app passa por essa linha dao.getReadableDatabase(); ele gera este erro: unknown error (code 1294 SQLITE_CANTOPEN_ENOENT[1294]): Could not open database. Alguma ideia do que pode ser?