htaccess Problem with Multisite and theme

Hi guys, i have a problem with the stockholm theme and the support team from them told me that it is an htaccesss problem but dont give me any help how i can fix it. I hope you can help me, the site is and the logo etc. isn`t loading you can see the problems via the console. Some things are forebidden etc. I granted you support via the wpmudev dashboard. I hope you can help me, i use the standard htaccess the is recommend from wordpress for multisites:

RewriteEngine On

RewriteBase /

RewriteRule ^index.php$ – [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).*) $2 [L]

RewriteRule ^([_0-9a-zA-Z-]+/)?(.*.php)$ $2 [L]

RewriteRule . index.php [L]