CSS and JS not loading with Nextcloud 12.0.3 and NGINX

Nextcloud version: 12.0.3
Operating system and version: Arch Linux
Apache or nginx version: nginx 1.12.1
PHP version: php-fpm 7.1.8
Is this the first time you’ve seen this error?: Yes

Can you reliably replicate it? (If so, please outline steps):
Just a fresh install of Nextcloud 12.0.3 does this (with having my data files copied)

The issue you are facing:
When accessing Nextcloud through the web (or through the mobile application on Android) the whole interface is scrambled as no CSS nor JS gets loaded. In my Firefox console log I get quite som errors regarding Content Security Policy, but main issue is that CSS and JS seem to be loaded improperly due to being redirected by the NGINX server to /apps/files/ instead of the actual file.

The output of your Nextcloud log in Admin > Logging:
Can’t go there.

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

?php
$CONFIG = array (
  'instanceid' => '....',
  'passwordsalt' => '.......',
  'secret' => '.....',
  'trusted_domains' =>
  array (
    0 => '...',
  ),  
  'datadirectory' => '....',
  'overwrite.cli.url' => '.......',
  'overwriteprotocol' => 'https',
  'trusted_proxies' => ['...'],
  'overwritewebroot' => '/',
  "overwritecondaddr" => "^....$",
  'dbtype' => 'mysql',
  'version' => '12.0.3.3',
  'dbname' => '.....',
  'dbhost' => 'localhost',
  'dbport' => '', 
  'dbtableprefix' => 'oc_',
  'dbuser' => '.........',
  'dbpassword' => '.....',
  'installed' => true,
  'log_type' => 'file',
  'logfile' => '/var/log/nextcloud.log',
  'loglevel' => 2,
  'syslog_tag' => 'Nextcloud',
  'log.condition' =>
  array (
    'shared_secret' => '......',
    'users' =>
    array (
      0 => 'sample-user',
    ),  
    'apps' =>
    array (
      0 => 'files',
    ),  
  ),  
  'logdateformat' => 'F d, Y H:i:s',
  'logtimezone' => '....',
  'log_query' => false,
  'cron_log' => true,
  'log_rotate_size' => 20971520,
  'auth.bruteforce.protection.enabled' => true,
  'memcache.local' => '\\OC\\Memcache\\Redis',
  'redis' =>
  array (
    'host' => '/var/run/redis/redis.sock',
    'port' => 0,
  ),
  'memcache.locking' => '\\OC\\Memcache\\Redis',
  'updater.secret' => '...........',
  'maintenance' => false,
  'theme' => '',
);

The output of your Apache/nginx/system log in /var/log/____:

[my-ip] - - [16/Nov/2017:09:29:35 ] "GET /apps/files/ HTTP/1.0" 200 38661 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:37 ] "GET /core/css/jquery-ui-fixes.css?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:37 ] "GET /core/vendor/select2/select2.css?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:38 ] "GET /core/vendor/jquery-ui/themes/base/jquery-ui.css?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:38 ] "GET /apps/files_versions/css/versions.css?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:38 ] "GET /apps/ojsxc/css/jsxc.oc.css?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:38 ] "GET /apps/files_pdfviewer/css/style.css?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:38 ] "GET /apps/files_videoplayer/css/style.css?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:39 ] "GET /apps/notifications/css/styles.css?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:39 ] "GET /apps/activity/css/style.css?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:39 ] "GET /core/css/jquery.ocdialog.css?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:39 ] "GET /apps/files_trashbin/css/trash.css?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:39 ] "GET /apps/comments/css/comments.css?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:39 ] "GET /apps/gallery/css/gallerybutton.css?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:40 ] "GET /apps/gallery/css/slideshow.css?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:40 ] "GET /core/vendor/core.js?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:40 ] "GET /apps/systemtags/css/systemtagsfilelist.css?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:40 ] "GET /apps/files/ HTTP/1.0" 200 38665 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:41 ] "GET /apps/files/ HTTP/1.0" 200 38663 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:41 ] "GET /apps/gallery/css/share.css?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:41 ] "GET /apps/files/ HTTP/1.0" 200 38663 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:41 ] "GET /apps/files/ HTTP/1.0" 200 38667 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:41 ] "GET /apps/files/ HTTP/1.0" 200 38665 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:42 ] "GET /apps/files/ HTTP/1.0" 200 38661 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:42 ] "GET /apps/files/ HTTP/1.0" 200 38663 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:42 ] "GET /apps/files/ HTTP/1.0" 200 38665 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:42 ] "GET /apps/files/ HTTP/1.0" 200 38671 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:42 ] "GET /apps/files/ HTTP/1.0" 200 38661 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:42 ] "GET /apps/files/ HTTP/1.0" 200 38663 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:43 ] "GET /apps/files/ HTTP/1.0" 200 38663 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:43 ] "GET /apps/files/ HTTP/1.0" 200 38665 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:43 ] "GET /apps/files/ HTTP/1.0" 200 38667 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:43 ] "GET /apps/files/ HTTP/1.0" 200 38661 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:43 ] "GET /apps/files/ HTTP/1.0" 200 38663 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:44 ] "GET /settings/img/help.svg?v=f75508bec9e0ec6e027f374af5d89059 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:44 ] "GET /core/img/actions/logout.svg?v=f75508bec9e0ec6e027f374af5d89059 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:44 ] "GET /apps/files/img/app.svg?v=f75508bec9e0ec6e027f374af5d89059 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:44 ] "GET /settings/img/users.svg?v=f75508bec9e0ec6e027f374af5d89059 HTTP/1.0" 302 0 "-" "[my-browser]" 
[my-ip] - - [16/Nov/2017:09:29:44 ] "GET /core/img/actions/delete.svg HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:44 ] "GET /apps/activity/img/activity.svg?v=f75508bec9e0ec6e027f374af5d89059 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:45 ] "GET /apps/notes/img/notes.svg?v=f75508bec9e0ec6e027f374af5d89059 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:45 ] "GET /apps/gallery/img/app.svg?v=f75508bec9e0ec6e027f374af5d89059 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:45 ] "GET /apps/tasks/img/tasks.svg?v=f75508bec9e0ec6e027f374af5d89059 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:45 ] "GET /apps/weather/img/app.svg?v=f75508bec9e0ec6e027f374af5d89059 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:45 ] "GET /core/search/js/search.js?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:45 ] "GET /settings/img/admin.svg?v=f75508bec9e0ec6e027f374af5d89059 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:46 ] "GET /settings/img/apps.svg?v=f75508bec9e0ec6e027f374af5d89059 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:46 ] "GET /apps/files/ HTTP/1.0" 200 38661 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:46 ] "GET /apps/files/ HTTP/1.0" 200 38663 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:46 ] "GET /settings/img/personal.svg?v=f75508bec9e0ec6e027f374af5d89059 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:46 ] "GET /apps/files/ HTTP/1.0" 200 38663 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:47 ] "GET /apps/ojsxc/js/jsxc/lib/jquery.slimscroll.js?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:47 ] "GET /apps/files/ HTTP/1.0" 200 38661 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:47 ] "GET /apps/files/ HTTP/1.0" 200 38665 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:47 ] "GET /apps/files/ HTTP/1.0" 200 38665 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:47 ] "GET /apps/files/ HTTP/1.0" 200 38665 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:48 ] "GET /apps/files/ HTTP/1.0" 200 38661 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:48 ] "GET /apps/ojsxc/js/jsxc/lib/jquery.fullscreen.js?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:48 ] "GET /apps/files/ HTTP/1.0" 200 38667 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:48 ] "GET /apps/files/ HTTP/1.0" 200 38665 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:48 ] "GET /apps/files/ HTTP/1.0" 200 38663 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:48 ] "GET /apps/files/ HTTP/1.0" 200 38667 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:49 ] "GET /apps/ojsxc/js/jsxc/lib/jsxc.dep.min.js?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:49 ] "GET /apps/files/ HTTP/1.0" 200 38663 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:49 ] "GET /apps/ojsxc/js/jsxc/jsxc.min.js?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:49 ] "GET /apps/ojsxc/js/ojsxc.js?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:49 ] "GET /apps/files_pdfviewer/js/previewplugin.js?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:51 ] "GET /apps/files_videoplayer/js/viewer.js?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:51 ] "GET /core/js/jquery-ui-fixes.js?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:51 ] "GET /core/js/files/fileinfo.js?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:51 ] "GET /core/js/files/client.js?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:52 ] "GET /core/js/contactsmenu.js?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:52 ] "GET /apps/files_sharing/js/app.js?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:52 ] "GET /apps/files_sharing/js/sharedfilelist.js?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:53 ] "GET /apps/files_trashbin/js/app.js?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:53 ] "GET /apps/files_trashbin/js/filelist.js?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:53 ] "GET /core/js/oc-backbone-webdav.js?v=f75508bec9e0ec6e027f374af5d89059-3 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:54 ] "GET /apps/notes/img/notes.svg?v=f75508bec9e0ec6e027f374af5d89059 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:55 ] "GET /apps/files/img/app.svg?v=f75508bec9e0ec6e027f374af5d89059 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:55 ] "GET /apps/activity/img/activity.svg?v=f75508bec9e0ec6e027f374af5d89059 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:55 ] "GET /apps/gallery/img/app.svg?v=f75508bec9e0ec6e027f374af5d89059 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:55 ] "GET /apps/tasks/img/tasks.svg?v=f75508bec9e0ec6e027f374af5d89059 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:55 ] "GET /settings/img/personal.svg?v=f75508bec9e0ec6e027f374af5d89059 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:55 ] "GET /settings/img/admin.svg?v=f75508bec9e0ec6e027f374af5d89059 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:56 ] "GET /apps/weather/img/app.svg?v=f75508bec9e0ec6e027f374af5d89059 HTTP/1.0" 302 0 "-" "[my-browser]"
[my-ip] - - [16/Nov/2017:09:29:56 ] "GET /settings/img/apps.svg?v=f75508bec9e0ec6e027f374af5d89059 HTTP/1.0" 302 0 "-" "[my-browser]"

I am using the NGINX configuration files which are presented at the manual. My NGINX also sits behind a proxy where my SSL certificate lives, but that was not an issue until I updated to 12.0.3 (manual update, went alright).

Please, assist! Thank you!!

Resolved! Permission problems apparently …