Can´t access via domain

Nextcloud version (eg, 12.0.2): 16.0.1
Operating system and version (eg, Ubuntu 17.04): Ubuntu 18.04
Apache or nginx version (eg, Apache 2.4.25): Apache 2.4.29
PHP version (eg, 7.1):7.2

The issue you are facing:
NC installation set up
access via mydomain.com gets me
apache default page

Is this the first time you’ve seen this error? (Y/N): N

Steps to replicate it:

The output of your Nextcloud log in Admin > Logging:

[core] Error: ImagickException: not authorized `/tmp/oc_tmp_B22kzm-.pdf' @ error/constitute.c/ReadImage/412 at <<closure>>

 0. /var/www/nextcloud/lib/private/Preview/Bitmap.php line 87
    Imagick->readimage("/tmp/oc_tmp_B22kzm-.pdf[0]")
 1. /var/www/nextcloud/lib/private/Preview/Bitmap.php line 50
    OC\Preview\Bitmap->getResizedPreview("/tmp/oc_tmp_B22kzm-.pdf", 1024, 768)
 2. /var/www/nextcloud/lib/private/Preview/GeneratorHelper.php line 59
    OC\Preview\Bitmap->getThumbnail("Nextcloud Manual.pdf", 1024, 768, false, OC\Files\View {})
 3. /var/www/nextcloud/lib/private/Preview/Generator.php line 194
    OC\Preview\GeneratorHelper->getThumbnail(OC\Preview\PDF {}, OC\Files\Node\File {}, 1024, 768)
 4. /var/www/nextcloud/lib/private/Preview/Generator.php line 118
    OC\Preview\Generator->getMaxPreview(OC\Files\SimpleFS\SimpleFolder {}, OC\Files\Node\File {}, "application/pdf")
 5. /var/www/nextcloud/lib/private/PreviewManager.php line 205
    OC\Preview\Generator->getPreview(OC\Files\Node\File {}, 500, 500, true, "fill", "application/pdf")
 6. /var/www/nextcloud/core/Controller/PreviewController.php line 175
    OC\PreviewManager->getPreview(OC\Files\Node\File {}, 500, 500, true, "fill")
 7. /var/www/nextcloud/core/Controller/PreviewController.php line 147
    OC\Core\Controller\PreviewController->fetchPreview(OC\Files\Node\File {}, 500, 500, false, false, "fill")
 8. /var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php line 166
    OC\Core\Controller\PreviewController->getPreviewByFileId(18, 500, 500, false, false, "fill")
 9. /var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php line 99
    OC\AppFramework\Http\Dispatcher->executeController(OC\Core\Controller\PreviewController {}, "getPreviewByFileId")
10. /var/www/nextcloud/lib/private/AppFramework/App.php line 126
    OC\AppFramework\Http\Dispatcher->dispatch(OC\Core\Controller\PreviewController {}, "getPreviewByFileId")
11. /var/www/nextcloud/lib/private/AppFramework/Routing/RouteActionHandler.php line 47
    OC\AppFramework\App::main("OC\\Core\\Controller\\PreviewController", "getPreviewByFileId", OC\AppFramework\ ... {}, {_route: "core.P ... "})
12. <<closure>>
    OC\AppFramework\Routing\RouteActionHandler->__invoke({_route: "core.P ... "})
13. /var/www/nextcloud/lib/private/Route/Router.php line 297
    undefinedundefinedcall_user_func(OC\AppFramework\ ... {}, {_route: "core.P ... "})
14. /var/www/nextcloud/lib/base.php line 975
    OC\Route\Router->match("/core/preview")
15. /var/www/nextcloud/index.php line 42
    OC::handleRequest()


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

<?php
$CONFIG = array (
  'instanceid' => 'secret',
  'passwordsalt' => 'secret',
  'secret' => 'secret',
  'trusted_domains' =>
  array (
    0 => '192.168.178.68',
    1 => 'example.ddnss.de',
    2 => 'http://',
  ),
  'overwrite.cli.url' => 'http://example.ddnss.de/',
  'htaccess.RewriteBase' => '/',
  'datadirectory' => '/home/rock64/nextcloud-files',
  'dbtype' => 'mysql',
  'version' => '16.0.1.1',
  'dbname' => 'nextcloud',
  'dbhost' => 'localhost',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'dbuser' => 'secret',
  'dbpassword' => 'secret',
  'installed' => true,
  'memcache.local' => '\\OC\\Memcache\\APCu',
  'activity_expire_days' => 14,
  'auth.bruteforce.protection.enabled' => true,                                                                                                                                                                                                                'blacklisted_files' =>                                                                                                                                                                                                                                       array (                                                                                                                                                                                                                                                        0 => '.htaccess',
    1 => 'Thumbs.db',
    2 => 'thumbs.db',
  ),
  'cron_log' => true,
  'enable_previews' => true,
  'enabledPreviewProviders' =>
  array (
    0 => 'OC\\Preview\\PNG',
    1 => 'OC\\Preview\\JPEG',
    2 => 'OC\\Preview\\GIF',
    3 => 'OC\\Preview\\BMP',
    4 => 'OC\\Preview\\XBitmap',
    5 => 'OC\\Preview\\Movie',
    6 => 'OC\\Preview\\PDF',
    7 => 'OC\\Preview\\MP3',
    8 => 'OC\\Preview\\TXT',
    9 => 'OC\\Preview\\MarkDown',
  ),
  'filesystem_check_changes' => 0,
  'filelocking.enabled' => 'true',
  'integrity.check.disabled' => false,
  'knowledgebaseenabled' => false,
  'logfile' => '/var/nc_data/nextcloud.log',
  'loglevel' => 2,
  'logtimezone' => 'Europe/Berlin',
  'log_rotate_size' => 104857600,
  'maintenance' => false,
  'preview_max_x' => 1024,
  'preview_max_y' => 768,
  'quota_include_external_storage' => false,
  'share_folder' => '/Shares',
  'skeletondirectory' => '',
  'theme' => '',
  'trashbin_retention_obligation' => 'auto, 7',
  'updater.release.channel' => 'stable',
  'mysql.utf8mb4' => true,
);

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

[Sun Jun 02 10:13:53.266412 2019] [authz_core:error] [pid 23544] [client 192.168.178.38:58051] AH01630: client denied by server configuration: /var/www/status.php

Furthermore, I can access locathost, but only via ip/nextcloud, despite the settings in config.php.

I would be graceful about any help at all.

Thanks in advance

Count Omega

You need to setup the name based virtual hosts correctly:
https://httpd.apache.org/docs/2.4/en/vhosts/name-based.html

The documentation of Nextcloud uses the default virtual host:
https://docs.nextcloud.com/server/16/admin_manual/installation/source_installation.html#apache-web-server-configuration

Problem solved. There is already another owncloud apache server in the same network which hinders the other from listening on port 80/443. I´ll have to edit my vhost accordingly.