kasih solusi Warning: mysqli_fetch_assoc() expects parameter 1 to be mysqli_result, boolean given in

help gan coding gw error dan gw ga ngerti dibagian whilenya ($row = mysqli_fetch_array($result)) {

<?php
      include_once "../koneksi/konek.php";
      $no = 0;
      $sql = "SELECT m.nama_mhs, j.ktm, j.ipk, y.no_seri, p.nama_prodi
			  FROM   ijazah y
			  INNER JOIN pengajuan j ON y.kd_ajuan=j.kd_ajuan
			  INNER JOIN mahasiswa m ON j.ktm = m.ktm
			  INNER JOIN prodi p ON m.kode_prodi = p.kode_prodi
			  ORDER BY y.sk_yudisium ASC ";
      $result = mysqli_query($koneksi, $sql);

      # perulangan untuk data yang tampil
      while ($row = mysqli_fetch_array($result)) {
        $no++;
        extract($row);
        echo "<tr>";
          echo "<td align=\"center\">{$no}</td>";
          echo "<td>[0]</td>";
          echo "<td>[1]</td>";
          echo "<td>[2]</td>";
          echo "<td>[3]</td>";
          echo "<td>[4]</td>";
        echo "</tr>";
      }
      ?>