404 Error on Multisite

I have been struggling with implementing a second site on WP Multisite – the images weren’t displaying on my second site so I was trying to fix that problem using people’s suggestions in forums, but now I have a bigger problem – when I try to access one of my sites on multisite I get a 404 error

404
Not Found
The resource requested could not be found on this server!

My .htaccess looks like this

# The following disables the display of a file
# index of a folder if there is no index found
# such as index.html, index.php, etc...

Options -Indexes
php_value display_errors on
# If you wish to change a PHP Setting you need
# to do it here and it will affect the folder
# that this file is located in as well as all
# sub-folders unless the sub-folder has it's
# own .htaccess
#
# As an example to turn the PHP Setting
# "magic_quotes_gpc" on you would uncomment
# the following line:
# php_flag magic_quotes_gpc on
#
# To set a value that is not on/off you need
# to use the php_value setting in the following
# format:
# php_value setting_to_change = value
#
# If you have any questions please contact
# support at support@mddhosting.com

# BEGIN WordPress
RewriteEngine on
#RewriteCond %{HTTP_HOST} ^culturecorners.com [NC]
#RewriteRule ^(.*)$ http://culturecorners.com/$1 [L,R=301]

RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]

# uploaded files
RewriteRule ^files/(.+) wp-includes/ms-files.php?file=$1 [L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule . index.php [L]

# END WordPress

And my wp-config.php file looks like this

<?php
/**
 * The base configuration for WordPress
 *
 * The wp-config.php creation script uses this file during the
 * installation. You don't have to use the web site, you can
 * copy this file to "wp-config.php" and fill in the values.
 *
 * This file contains the following configurations:
 *
 * * MySQL settings
 * * Secret keys
 * * Database table prefix
 * * ABSPATH
 *
 * @link https://codex.wordpress.org/Editing_wp-config.php
 *
 * @package WordPress
 */

// ** MySQL settings - You can get this info from your web host ** //
/** The name of the database for WordPress */
define('DB_NAME', xxx');

/** MySQL database username */
define('DB_USER', xxx');

/** MySQL database password */
define('DB_PASSWORD', 'xxx');

/** 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', '');

/** To fix images not displaying in multisite
define( 'WP_ALLOW_MULTISITE', true );

/**#@+
 * 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',         'iojlqqdmq2y8kuorkvgpzgbloum35umnh5uuivrgnmuf4gvy78rnbl5svgwnifka');
define('SECURE_AUTH_KEY',  '3yjfdvkfz4iurwcsnloo41vs8tkbr3nzk1pegljdq5dx843jimrrknvg9ekayxhk');
define('LOGGED_IN_KEY',    'oungqkacc222oixrr3dflt4w1p6eakvi1g7udu5hgbko6iidks0yi2tul7soeplb');
define('NONCE_KEY',        'ys3ftdbtxsjcoxlnyckcyhdw1nq1olembeclvren1kdq4mftpdwkpwtsdrcqfecy');
define('AUTH_SALT',        'xplk0cx9hytvo9dwesr621ojym9ymlmefafho7w9dizf8ksir8jfwlhmo0lthfk5');
define('SECURE_AUTH_SALT', 'uwotbcwzjczxg66gy5p1yrpru6u7fpkedoeb4evw866gso1cimdviuizcmjjbuqq');
define('LOGGED_IN_SALT',   'vdxcqahajvouyxb7d84h1dqyc90lldzqahvzmdqipfojh8vydyuowdl5zpk7jrp9');
define('NONCE_SALT',       'eafdjqc9eiidfclkr2d9wzkxd0qj0xvs3s79v6ekdujbkai77xtvp4rcxqyyvlsi');

/**#@-*/

/**
 * 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_';

/**
 * 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.
 *
 * For information on other constants that can be used for debugging,
 * visit the Codex.
 *
 * @link https://codex.wordpress.org/Debugging_in_WordPress
 */
define('WP_DEBUG', false);

/* Multisite */
define ('WP_MULTISITE_ALLOW', true);
define('MULTISITE', true);
define('SUBDOMAIN_INSTALL', false);
define('DOMAIN_CURRENT_SITE', 'culturecorners.com');
define('PATH_CURRENT_SITE', '/wp/');
define('SITE_ID_CURRENT_SITE', 1);
define('BLOG_ID_CURRENT_SITE', 1);

/* 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');

I really appreciate any help!!!