The page is not being created. What's my mistake?

Question

PHP

Products are displayed on the catalog.php page. There is a list with categories. By clicking on the list item, a page should be generated. But I only get 404. What am I doing wrong?

<?php
$result = mysql_query("SELECT * FROM category WHERE type='gpu'",$link);
 If (mysql_num_rows($result) > 0)
{
$row = mysql_fetch_array($result);
do
{
    echo '   
  <li><a href="view_cat.php?cat='.strtolower($row["brand"]).'&type='.$row["type"].'">'.$row["brand"].'</a></li>
    ';
}
 while ($row = mysql_fetch_array($result));
} 
?>

Answer 1

and physically it is view_cat.php?

Answer 2

Apparently the view_cat.php file is missing

Answer 3

or deal with.htaccess