/network/settings.php 'Page not found', but the file is there

Yeah — was working fine forever. Happened some time between the last time I used it, like a month ago, and now. I did turn back on W3 cache and CloudFlare, so I’ll try disabling them one-by-one and see what that does.

Here’s .htaccess:

<IfModule mod_suphp.c>
suPHP_ConfigPath /home/nfnnet/public_html
</IfModule>
<Files php.ini>
order allow,deny
deny from all
</Files>

# -FrontPage-
IndexIgnore .htaccess */.??* *~ *# */HEADER* */README* */_vti*
<Limit GET POST>
order deny,allow
deny from all
allow from all
</Limit>
<Limit PUT DELETE>
order deny,allow
deny from all
</Limit>
AuthName nfn8.net
AuthUserFile /home/nfnnet/public_html/_vti_pvt/service.pwd
AuthGroupFile /home/nfnnet/public_html/_vti_pvt/service.grp

# BEGIN W3TC Browser Cache
<IfModule mod_deflate.c>
    <IfModule mod_setenvif.c>
        BrowserMatch ^Mozilla/4 gzip-only-text/html
        BrowserMatch ^Mozilla/4\.0[678] no-gzip
        BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
        BrowserMatch \bMSI[E] !no-gzip !gzip-only-text/html
    </IfModule>
    <IfModule mod_headers.c>
        Header append Vary User-Agent env=!dont-vary
    </IfModule>
    <IfModule mod_filter.c>
        AddOutputFilterByType DEFLATE text/css application/x-javascript text/x-component text/html text/richtext image/svg+xml text/plain text/xsd text/xsl text/xml image/x-icon
    </IfModule>
</IfModule>
<FilesMatch "\.(css|js|htc|CSS|JS|HTC)$">
    FileETag None
    <IfModule mod_headers.c>
         Header set X-Powered-By "W3 Total Cache/0.9.2.4"
    </IfModule>
</FilesMatch>
<FilesMatch "\.(html|htm|rtf|rtx|svg|svgz|txt|xsd|xsl|xml|HTML|HTM|RTF|RTX|SVG|SVGZ|TXT|XSD|XSL|XML)$">
    FileETag None
    <IfModule mod_headers.c>
         Header set X-Powered-By "W3 Total Cache/0.9.2.4"
    </IfModule>
</FilesMatch>
<FilesMatch "\.(asf|asx|wax|wmv|wmx|avi|bmp|class|divx|doc|docx|eot|exe|gif|gz|gzip|ico|jpg|jpeg|jpe|mdb|mid|midi|mov|qt|mp3|m4a|mp4|m4v|mpeg|mpg|mpe|mpp|otf|odb|odc|odf|odg|odp|ods|odt|ogg|pdf|png|pot|pps|ppt|pptx|ra|ram|svg|svgz|swf|tar|tif|tiff|ttf|ttc|wav|wma|wri|xla|xls|xlsx|xlt|xlw|zip|ASF|ASX|WAX|WMV|WMX|AVI|BMP|CLASS|DIVX|DOC|DOCX|EOT|EXE|GIF|GZ|GZIP|ICO|JPG|JPEG|JPE|MDB|MID|MIDI|MOV|QT|MP3|M4A|MP4|M4V|MPEG|MPG|MPE|MPP|OTF|ODB|ODC|ODF|ODG|ODP|ODS|ODT|OGG|PDF|PNG|POT|PPS|PPT|PPTX|RA|RAM|SVG|SVGZ|SWF|TAR|TIF|TIFF|TTF|TTC|WAV|WMA|WRI|XLA|XLS|XLSX|XLT|XLW|ZIP)$">
    FileETag None
    <IfModule mod_headers.c>
         Header set X-Powered-By "W3 Total Cache/0.9.2.4"
    </IfModule>
</FilesMatch>
# END W3TC Browser Cache
# BEGIN W3TC Page Cache core
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /
    RewriteRule ^(.*\/)?w3tc_rewrite_test$ $1?w3tc_rewrite_test=1 [L]
    RewriteCond %{HTTP_HOST} ^(www\.)?([a-z0-9\-\.]+\.[a-z]+)\.?(:[0-9]+)?$
    RewriteRule .* - [E=W3TC_DOMAIN:%2]
    RewriteCond %{HTTP:Accept-Encoding} gzip
    RewriteRule .* - [E=W3TC_ENC:_gzip]
    RewriteCond %{REQUEST_METHOD} !=POST
    RewriteCond %{QUERY_STRING} =""
    RewriteCond %{HTTP_HOST} =linkedintelligence.com
    RewriteCond %{REQUEST_URI} \/$ [OR]
    RewriteCond %{REQUEST_URI} (sitemap(_index)?\.xml(\.gz)?|[a-z0-9_\-]+-sitemap([0-9]+)?\.xml(\.gz)?) [NC]
    RewriteCond %{REQUEST_URI} !(\/wp-admin\/|\/xmlrpc.php|\/wp-(app|cron|login|register|mail)\.php|\/feed\/|wp-.*\.php|index\.php) [NC,OR]
    RewriteCond %{REQUEST_URI} (wp\-comments\-popup\.php|wp\-links\-opml\.php|wp\-locations\.php) [NC]
    RewriteCond %{HTTP_COOKIE} !(comment_author|wp\-postpass|wordpress_\[a\-f0\-9\]\+|wordpress_logged_in) [NC]
    RewriteCond %{HTTP_USER_AGENT} !(W3\ Total\ Cache/0\.9\.2\.4) [NC]
    RewriteCond "%{DOCUMENT_ROOT}/wp-content/w3tc-%{ENV:W3TC_DOMAIN}/pgcache/%{REQUEST_URI}/_index%{ENV:W3TC_UA}%{ENV:W3TC_REF}%{ENV:W3TC_SSL}.html%{ENV:W3TC_ENC}" -f
    RewriteRule .* "/wp-content/w3tc-%{ENV:W3TC_DOMAIN}/pgcache/%{REQUEST_URI}/_index%{ENV:W3TC_UA}%{ENV:W3TC_REF}%{ENV:W3TC_SSL}.html%{ENV:W3TC_ENC}" [L]
</IfModule>
# END W3TC Page Cache core
# BEGIN WordPress

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

RewriteCond %{HTTP_HOST} ^nfn8\.com$ [OR]
RewriteCond %{HTTP_HOST} ^www\.nfn8\.com$
RewriteRule ^/?$ "http\:\/\/nfn8\.net" [R=301,L]

RewriteCond %{HTTP_HOST} ^nfn8\.com$ [OR]
RewriteCond %{HTTP_HOST} ^www\.nfn8\.com$
RewriteRule ^domains\/scottsocialmediaallen\/?(.*)$ "http\:\/\/ScottSocialMediaAllen\.com\/$1" [R=301,L]