Multisite /wp-admin/network/plugins.php server error

When I try to access my network plugin page: https://sanwinbeachwear.com/wp-admin/network/plugins.php

Or my themes page: https://sanwinbeachwear.com/wp-admin/network/themes.php

I get an server error.

The strange thing is that the install plugin page is working fine.

This is in my htaccess file:

‘# Use PHP5.4 Single php.ini as default
AddHandler application/x-httpd-php54s .php

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]

# add a trailing slash to /wp-admin
RewriteRule ^wp-admin$ wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ – [L]
RewriteRule ^(wp-(content|admin|includes).*) $1 [L]
RewriteRule ^(.*\.php)$ wp/$1 [L]
RewriteRule . index.php [L]
</IfModule>

# END WordPress’

Would be great if someone could help me out 8)