Installation du logiciel pmb

Warning: Use of undefined constant DATA_BASE - assumed 'DATA_BASE' (this will throw an Error in a future version of PHP) in C:\xampp\htdocs\pmb\includes\mysql_connect.inc.php on line 41

Fatal error: Uncaught Error: Call to a member function select_db() on null in C:\xampp\htdocs\pmb\includes\mysql_functions.inc.php:396 Stack trace: #0 C:\xampp\htdocs\pmb\includes\mysql_connect.inc.php(43): pmb_mysql_select_db('DATA_BASE', 0) #1 C:\xampp\htdocs\pmb\index.php(53): connection_mysql(0) #2 {main} thrown in C:\xampp\htdocs\pmb\includes\mysql_functions.inc.php on line 396

Voici les parties des codes concernée par les erreurs:
C:\xampp\htdocs\pmb\includes\mysql_connect.inc.php

39  if($bd) {
40        if ($my_bd == '') {
41            $my_bd = DATA_BASE;
42        }
43        if( pmb_mysql_select_db($my_bd, $my_connec)==0 && $er_bd==1 ) {
44            $__erreur_cnx_base__ = 'erreur '.pmb_mysql_errno().' : '.pmb_mysql_error().'<br />';
45            return 0 ;
46            }
47        }

C:\xampp\htdocs\pmb\index.php

52  require_once("$include_path/mysql_connect.inc.php");
53  $dbh = connection_mysql(0);

C:\xampp\htdocs\pmb\includes\mysql_functions.inc.php

395  function pmb_mysql_select_db($database_name, $link_identifier = null){
396         return pmb_mysqli::get_connection($link_identifier)->select_db($database_name);
397  }

J'ai utilisé PMB version 7.3.7 et Xampp version 7.3.25, Apache et MySQL fonctionnent . Je ne sais pas comment résoudre cet problème.

Merci par avance pour votre aide !