PHP - Wamp Phpmyadmin Error

I am making a simple form, but when trying to send all the information to my database the code doesn't seem to work. I don't know how much about php and would appreciate if you could check what the problem is. When I displayed errors it said the error is in the 21. line with $stmt->bind_param.

<?php
ini_set('display_errors', 1);

$gender = $_POST['gender'];
$opinionb = $_POST['opinionb'];
$opinionn = $_POST['opinionn'];

$host = "localhost";
$dbUsername = "*";
$dbPassword = "*";
$dbname = "*";

$conn = new mysqli($host, $dbUsername, $dbPassword, $dbname);

if (mysqli_connect_error()) {
	die('Connect Error('. mysqli_connect_errno().')'. mysqli_connect_error());
} else {
	$INSERT = "INSERT Into register (gender, opinionb, opinionn) values(?, ?, ?)";
	
	$stmt = $conn->prepare($INSERT);
	$stmt->bind_param('sss', $gender, $opinionb, $opinionn);
	$stmt->execute();
}
?>

I have the following php code that errors as indicated:

$query = $con->query('SELECT FILENAME, country, area, city FROM download WHERE FILENAME is not null');

Fatal error: Uncaught PDOException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'country' in 'field list' in /home/larry/web/test/public_html/report1.php:47 Stack trace: #0 /home/larry/web/test/public_html/report1.php(47): PDO->query('SELECT FILENAME...') #1 {main} thrown in /home/larry/web/test/public_html/report1.php on line 47

The Select statement doesn't error when run in mysql shell or phpmyadmin. Here's the result of show create table download:

localhost/test/download/        http://localhost/phpmyadmin/tbl_sql.php?db=test&table=download&token=5739c407033be3e118287bc7a9041c2c
 Current selection does not contain a unique column. Grid edit, checkbox, Edit, Copy and Delete features are not available. 

Your SQL query has been executed successfully.

show create table download

download    CREATE TABLE `download` (
  `ID` int(5) NOT NULL AUTO_INCREMENT,
  `LOG_TIME` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `IP_ADDRESS` int(64) unsigned NOT NULL,
  `FILENAME` varchar(50) COLLATE utf8_general_mysql500_ci DEFAULT NULL,
  `country` varchar(50) COLLATE utf8_general_mysql500_ci DEFAULT NULL,
  `area` varchar(50) COLLATE utf8_general_mysql500_ci DEFAULT NULL,
  `city` varchar(50) COLLATE utf8_general_mysql500_ci DEFAULT NULL,
  PRIMARY KEY (`ID`),
  UNIQUE KEY `ID` (`ID`)
) ENGINE=InnoDB AUTO_INCREMENT=1266 DEFAULT CHARSET=utf8 COLLATE=utf8_general_mysql500_ci    

Does anyone have an idea why this is happening?

I'm currently trying to building a websocket widget, using node package manager(NPM),WAMPserver and electronjs.
the package was well installed because when i start it it works. It log into the console
But i dont know how i can  handle with html. it seems electronjs is not working fow wamp and websocket 
 

public function insert($table, $fields = array())
   { if(count($fields)) //true if $fields holds data
     { $keys = array_keys($fields);

       $values = '';  //to put inside query
       
       $x = 1;

      foreach($fields as $field)
      { $values .= '?';
        if($x < count($fields))
        { $values .= ', ';
        }
        $x++;
      }
   $sql = "INSERT INTO {$table} (`".implode('`, `', $keys) . "`) VALUES({$values})";
      if(!$this->query($sql, $fields)->error())
      { return true;
      }
     }
     return false;
   }

  public function query($sql, $darams = array())
  {
    $this->_error = false;   //reset error
    if($this->_query = $this->_pdo->prepare($sql))
    { $x = 1;
      if(count($darams))
      { foreach($darams as $param)
        { $this->_query->bindValue($x, $param);
          $x++;
        }
      }
      if($this->_query->execute())
      { $this->_results = $this->_query->fetchAll(PDO::FETCH_OBJ);
        $this->_count = $this->_query->rowCount();
      }
      else      //an error has occured in SQL query
      { $this->_error = true;
      }
    }
    return $this;
  }

  public function error()
  { return $this->_error;
   }

   public function count()
   { return $this->_count;
   }

Hi Guys,

how to execute batch file in wamp server php code.

Could you please help on that.