Stylesheet not parsed because non CSS MIME types are not allowed in strict mode
<p>I am getting the following error on my site:</p>

<pre><code>[Error] Did not parse stylesheet at 'http://test.opendialogueapproach.co.uk/wp-content/plugins/revslider/public/assets/css/settings.css?ver=5.2.5.3' because non CSS MIME types are not allowed in strict mode.
</code></pre>

<p>Having done some research it seems that this is probably related to my nginx configuration, but my nginx files seem to be structured rather different to those I have seen elsewhere, so I'm not sure what changes are needed to fix the issue. I am including the three nginx files that seem relevant below:</p>

<p>first the mime.conf file in etc/nginx
then the nginx.conf, also in etc/nginx
and finally the conf file for my site in etc/nginx/conf.d</p>

<p><strong>mime.conf</strong></p>

<pre><code>types {
    text/html                             html htm shtml;
    text/css                              css;
    text/xml                              xml rss;
    image/gif                             gif;
    image/jpeg                            jpeg jpg;
    application/x-javascript              js;
    text/plain                            txt;
    text/x-component                      htc;
    text/mathml                           mml;
    image/png                             png;
    image/svg+xml                         svg svgz;
    image/x-icon                          ico;
    image/x-jng                           jng;
    image/vnd.wap.wbmp                    wbmp;
    application/java-archive              jar war ear;
    application/mac-binhex40              hqx;
    application/pdf                       pdf;
    application/x-cocoa                   cco;
    application/x-java-archive-diff       jardiff;
    application/x-java-jnlp-file          jnlp;
    application/x-makeself                run;
    application/x-perl                    pl pm;
    application/x-pilot                   prc pdb;
    application/x-rar-compressed          rar;
    application/x-redhat-package-manager  rpm;
    application/x-sea                     sea;
    application/x-shockwave-flash         swf;
    application/x-stuffit                 sit;
    application/x-tcl                     tcl tk;
    application/x-x509-ca-cert            der pem crt;
    application/x-xpinstall               xpi;
    application/zip                       zip;
    application/octet-stream              deb;
    application/octet-stream              bin exe dll;
    application/octet-stream              dmg;
    application/octet-stream              eot;
    application/octet-stream              iso img;
    application/octet-stream              msi msp msm;
    audio/mpeg                            mp3;
    audio/ogg                             oga ogg;
    audio/wav                             wav;
    audio/x-realaudio                     ra;
    video/mp4                             mp4;
    video/mpeg                            mpeg mpg;
    video/ogg                             ogv;
    video/quicktime                       mov;
    video/webm                            webm;
    video/x-flv                           flv;
    video/x-msvideo                       avi;
    video/x-ms-wmv                        wmv;
    video/x-ms-asf                        asx asf;
    video/x-mng                           mng;
}
</code></pre>

<p><strong>nginx.conf</strong></p>

<pre><code>user www-data www-data;
pid /var/run/nginx.pid;
worker_processes 2;
worker_rlimit_nofile 100000;

events {
    worker_connections  4096;
    include /etc/nginx.custom.events.d/*.conf;
}

http {
    default_type application/octet-stream;

    access_log off;
    error_log  /var/log/nginx/error.log crit;

    sendfile on;
    tcp_nopush on;

    keepalive_timeout 20;
    client_header_timeout 20;
    client_body_timeout 20;
    reset_timedout_connection on;
    send_timeout 20;

    types_hash_max_size 2048;

    gzip on;
    gzip_disable "msie6";
    gzip_proxied any;
    gzip_min_length 256;
    gzip_comp_level 4;
    gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript application/javascript text/x-js;

    server_names_hash_bucket_size 128;

    include mime.conf;
    charset UTF-8;

    open_file_cache max=100000 inactive=20s;
    open_file_cache_valid 30s;
    open_file_cache_min_uses 2;
    open_file_cache_errors on;

    server_tokens off;
    ssl_protocols TLSv1 TLSv1.1 TLSv1.2;

    include proxy.conf;
    include fcgi.conf;

    include conf.d/*.conf;
    include /etc/nginx.custom.d/*.conf;
}

include /etc/nginx.custom.global.d/*.conf;
</code></pre>

<p><strong>Site conf file:</strong></p>

<pre><code>server {
    listen *:80;


    server_name test.opendialogueapproach.co.uk;

    access_log /var/log/nginx/testopendialogueapproachcouk.access.log;
    error_log /var/log/nginx/testopendialogueapproachcouk.error.log;

    root /var/www/opendialogueapproach.co.uk/test/html;
    index index.html index.htm index.php;

    location / {
        try_files $uri $uri/ /index.php?q=$request_uri;
}

location /wp-content/uploads/bp-attachments/ {
    rewrite ^.*uploads/bp-attachments/([0-9]+)/(.*) /?p=$1&amp;bp-attachment=$2 permanent;
}



    location ~ [^/]\.php(/|$) {



        fastcgi_index index.php;
        include fcgi.conf;
        fastcgi_pass unix:/var/run/ajenti-v-php-fcgi-testopendialogueapproachcouk-php-fcgi-0.sock;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;

    }

}
</code></pre>