in wpmu the images are not showing in the subdirectory sites.

my site is at https://cheapkitchenwares.com/MU/
the sub sites : https://cheapkitchenwares.com/MU/mm/
the images are working good on main site of n/w but not in the subsites

the .htaccess is looks like this

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

# uploaded files
RewriteRule ^([_0-9a-zA-Z-]+/)?files/(.+) wp-includes/ms-files.php?file=$2 [L]

# add a trailing slash to /wp-admin
RewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule  ^[_0-9a-zA-Z-]+/(wp-(content|admin|includes).*) $1 [L]
RewriteRule  ^[_0-9a-zA-Z-]+/(.*\.php)$ $1 [L]
RewriteRule . index.php [L]

Upload Path :wp-content/blogs.dir/5/files
Fileupload Url : https://cheapkitchenwares.com/MU/mm/files