BuddyPress.org

Try xampp instead and make sure the info in the wp-config.php is correct:
http://www.apachefriends.org/en/xampp.html

Well I use xampp and I can assist you better if we are using the same software. I can tell you for certain that something is wrong in your wp-config.php thats causing these errors between buddypress and mysql database.
Edit:
Regardless of what software your using I would take a look at your wp-config.php and try to work it out from there.

In your wp-config.php change:
/** MySQL database password */
define(‘DB_PASSWORD’, ‘password’);
to:
/** MySQL database password */
define(‘DB_PASSWORD’, ‘’);

Then check the other fields. Here is a copy of one of my local sites wp-config.php:
<?php
/**
* The base configurations of the WordPress.
*
* This file has the following configurations: MySQL settings, Table Prefix,
* Secret Keys, WordPress Language, and ABSPATH. You can find more information
* by visiting { @link https://codex.wordpress.org/Editing_wp-config.php Editing
* wp-config.php} Codex page. You can get the MySQL settings from your web host.
*
* This file is used by the wp-config.php creation script during the
* installation. You don’t have to use the web site, you can just copy this file
* to “wp-config.php” and fill in the values.
*
* @package WordPress
*/

// ** MySQL settings – You can get this info from your web host ** //
/** The name of the database for WordPress */
define(‘DB_NAME’, ‘bpdev’);

/** MySQL database username */
define(‘DB_USER’, ‘root’);

/** MySQL database password */
define(‘DB_PASSWORD’, ”);

/** MySQL hostname */
define(‘DB_HOST’, ‘localhost’);

/** Database Charset to use in creating database tables. */
define(‘DB_CHARSET’, ‘utf8’);

/** The Database Collate type. Don’t change this if in doubt. */
define(‘DB_COLLATE’, ”);

/**#@+
* Authentication Unique Keys and Salts.
*
* Change these to different unique phrases!
* You can generate these using the { @link https://api.wordpress.org/secret-key/1.1/salt/ WordPress.org secret-key service}
* You can change these at any point in time to invalidate all existing cookies. This will force all users to have to log in again.
*
* @since 2.6.0
*/
define(‘AUTH_KEY’, ‘gKR[~e-<4 |Jj1DVfT-RM.m(|=M7(OB;tp/bfQt9+9[+FcIK<Gdp[(*u~2@-_H*J');
define(‘SECURE_AUTH_KEY’, ‘_$y7AKT$.Zz`XHS3 DxndhyLGd/3ITTfE3oJqphSGS:x1*TH@45D 6NIjU7y64om’);
define(‘LOGGED_IN_KEY’, ‘i6[pr$z#c,0E&EI]j]:K}cG9N`J[:JsL]wgy%[coeV>h(<c#W%Ye');
define(‘NONCE_KEY’, ‘@GH9@ITlC&Py&cG3O5sKaVrm;vqP/4mKYz#=n>K?`%:C.q56yFO4WEaY:g^Rs+>+’);
define(‘AUTH_SALT’, ‘QulXiJdP`zXXz*D*]RbfXfH[$C6 Z;:n>pLwcrSZvkY!7|*mHxyS>#n^qqiD2noO’);
define(‘SECURE_AUTH_SALT’, ‘3/{(F|iduMA;QfF%OPY:jHTH:D8jcmWB&h`gfs$K4L&uTVhg1.05nz~h.COtvf+7’);
define(‘LOGGED_IN_SALT’, ‘YG?P2/ <+A,W8L:r<0^9~n1c<aO-w|OTl~.o^T39ZPp)tz7&V~[x57X&n,(*(iA0');
define(‘NONCE_SALT’, ‘|G0,AO(>,Ak @y a/A;Kf3it9W~Lv[/q*?,Pe!Dqf~WDzKzD?JJQ+V%.:]icGtzq/’);

/**#@-*/

/**
* WordPress Database Table prefix.
*
* You can have multiple installations in one database if you give each a unique
* prefix. Only numbers, letters, and underscores please!
*/
$table_prefix = ‘wp_’;

/**
* WordPress Localized Language, defaults to English.
*
* Change this to localize WordPress. A corresponding MO file for the chosen
* language must be installed to wp-content/languages. For example, install
* de_DE.mo to wp-content/languages and set WPLANG to ‘de_DE’ to enable German
* language support.
*/
define(‘WPLANG’, ”);

/**
* For developers: WordPress debugging mode.
*
* Change this to true to enable the display of notices during development.
* It is strongly recommended that plugin and theme developers use WP_DEBUG
* in their development environments.
*/
define(‘WP_DEBUG’, false);

/* That’s all, stop editing! Happy blogging. */

/** Absolute path to the WordPress directory. */
if ( !defined(‘ABSPATH’) )
define(‘ABSPATH’, dirname(__FILE__) . ‘/’);

/** Sets up WordPress vars and included files. */
require_once(ABSPATH . ‘wp-settings.php’);

Works fine in local environments. I personally use MAMP. You didn’t say what the error that you’re getting was?