**White Screen (Blank Page):**
- Check PHP version (needs 8.0+)
- Enable error reporting in php.ini
- Check file permissions (755 for folders, 644 for files)
- Contact support
**Database Connection Error:**
- Verify database credentials
- Check database host (usually localhost)
- Ensure MySQL user has proper privileges
- Confirm database exists
**404 Errors:**
- Check .htaccess file exists
- Verify mod_rewrite enabled
- Check file/folder permissions
- Review hosting provider documentation
**500 Internal Server Error:**
- Check error logs
- Verify PHP version compatibility
- Check file permissions
- Contact hosting provider