NC 19.0.3 - Webinterface after Login shows blank screen

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Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can :heart:

Nextcloud version (eg, 18.0.2): 19.0.3
Operating system and version (eg, Ubuntu 20.04):18.04.5 LTS
Apache or nginx version (eg, Apache 2.4.25): Apache/2.4.46 (Ubuntu)
PHP version (eg, 7.1):PHP 7.4.10 (cli) (built: Sep 9 2020 06:36:14) ( NTS )

The issue you are facing:
A few days after nexctloud was upgrade to 19.0.3 (which went smooth) the webinterface (www.cloud.mfgp.ch) only displays the content after login in text. Graphical interface is not available.

After installing the backup it runs for a few days correctly and then suddenly the webinterface is shown in plain text only. Interestingly when NC set to maintenance Mode on, webinterface “Maintenance Mode” is shown perfectly. As soon as maintenance Mode is set to off, only plain text content is displayed.

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

Steps to replicate it:

  1. Install Server Backup
  2. It runs for a approx. 2 days then falls back into the above descreibe failure mode

The output of your Nextcloud log in Admin > Logging:

/var/www/nextcloud/data/nextcloud.log -> has no content

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

<?php
$CONFIG = array (
  'instanceid' => 'ocu4cd7liilp',
  'passwordsalt' => '',
  'secret' => '',
  'trusted_domains' => 
  array (
    0 => '',
    1 => '',
  ),
  'datadirectory' => '/home/data/',
  'dbtype' => 'mysql',
  'version' => '19.0.3.1',
  'overwrite.cli.url' => 'http://cloud.mfgp.ch',
  'dbname' => 'nextcloud',
  'dbhost' => 'localhost',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'dbuser' => 'nextclouduser',
  'dbpassword' => '',
  'installed' => true,
  'mysql.utf8mb4' => true,
  'maintenance' => false,
  'memcache.local' => '\\OC\\Memcache\\APCu',
  'mail_smtpmode' => 'smtp',
  'mail_sendmailmode' => 'smtp',
  'mail_from_address' => 'ict',
  'mail_domain' => 'mfgp.ch',
  'mail_smtphost' => '149.hosttech.eu',
  'mail_smtpauthtype' => 'LOGIN',
  'mail_smtpport' => '587',
  'mail_smtpauth' => 1,
  'mail_smtpname' => '',
  'mail_smtppassword' => '',
  'skeletondirectory' => '',
  'theme' => '',
  'loglevel' => 2,
);

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

[Tue Sep 29 18:44:30.459380 2020] [mpm_prefork:notice] [pid 9269] AH00169: caught SIGTERM, shutting down
[Tue Sep 29 18:44:30.545907 2020] [so:warn] [pid 9515] AH01574: module php7_module is already loaded, skipping
[Tue Sep 29 18:44:30.586505 2020] [mpm_prefork:notice] [pid 9520] AH00163: Apache/2.4.29 (Ubuntu) OpenSSL/1.1.1g configured -- resuming normal operations
[Tue Sep 29 18:44:30.586530 2020] [core:notice] [pid 9520] AH00094: Command line: '/usr/sbin/apache2'
[Tue Sep 29 18:53:07.120824 2020] [access_compat:error] [pid 9535] [client 188.60.222.215:50821] AH01797: client denied by server configuration: /var/www/nextcloud/config
[Tue Sep 29 18:53:08.310004 2020] [access_compat:error] [pid 9552] [client 84.241.72.212:56179] AH01797: client denied by server configuration: /var/www/nextcloud/config
[Tue Sep 29 18:53:09.168256 2020] [access_compat:error] [pid 9536] [client 62.202.181.172:43131] AH01797: client denied by server configuration: /var/www/nextcloud/config
[Tue Sep 29 18:53:10.032639 2020] [access_compat:error] [pid 9829] [client 84.241.83.97:61227] AH01797: client denied by server configuration: /var/www/nextcloud/config
[Tue Sep 29 18:53:38.735448 2020] [access_compat:error] [pid 9546] [client 188.60.222.215:50823] AH01797: client denied by server configuration: /var/www/nextcloud/config
[Tue Sep 29 18:53:40.134314 2020] [access_compat:error] [pid 9853] [client 84.241.72.212:56188] AH01797: client denied by server configuration: /var/www/nextcloud/config
[Tue Sep 29 18:53:40.809299 2020] [access_compat:error] [pid 9536] [client 62.202.181.172:10405] AH01797: client denied by server configuration: /var/www/nextcloud/config
[Tue Sep 29 18:53:41.624271 2020] [access_compat:error] [pid 9539] [client 84.241.83.97:61231] AH01797: client denied by server configuration: /var/www/nextcloud/config
[Tue Sep 29 18:54:10.772275 2020] [access_compat:error] [pid 9549] [client 188.60.222.215:50825] AH01797: client denied by server configuration: /var/www/nextcloud/config
[Tue Sep 29 18:54:11.948253 2020] [access_compat:error] [pid 9551] [client 84.241.72.212:56198] AH01797: client denied by server configuration: /var/www/nextcloud/config
[Tue Sep 29 18:54:12.807887 2020] [access_compat:error] [pid 9550] [client 62.202.181.172:10404] AH01797: client denied by server configuration: /var/www/nextcloud/config
[Tue Sep 29 18:54:13.639072 2020] [access_compat:error] [pid 9546] [client 84.241.83.97:61235] AH01797: client denied by server configuration: /var/www/nextcloud/config
[Tue Sep 29 18:54:16.776056 2020] [access_compat:error] [pid 9904] [client 84.241.72.212:56201] AH01797: client denied by server configuration: /var/www/nextcloud/config
[Tue Sep 29 18:54:28.551661 2020] [access_compat:error] [pid 9535] [client 188.60.222.215:50827] AH01797: client denied by server configuration: /var/www/nextcloud/config
[Tue Sep 29 18:54:35.562170 2020] [access_compat:error] [pid 9539] [client 62.202.181.172:10360] AH01797: client denied by server configuration: /var/www/nextcloud/config
[Tue Sep 29 18:54:42.396795 2020] [access_compat:error] [pid 9905] [client 84.241.83.97:61237] AH01797: client denied by server configuration: /var/www/nextcloud/config
[Tue Sep 29 19:07:52.166192 2020] [mpm_prefork:notice] [pid 9520] AH00169: caught SIGTERM, shutting down
[Tue Sep 29 19:09:33.163380 2020] [so:warn] [pid 848] AH01574: module php7_module is already loaded, skipping
[Tue Sep 29 19:09:35.879104 2020] [mpm_prefork:notice] [pid 1287] AH00163: Apache/2.4.29 (Ubuntu) OpenSSL/1.1.1g configured -- resuming normal operations
[Tue Sep 29 19:09:35.879149 2020] [core:notice] [pid 1287] AH00094: Command line: '/usr/sbin/apache2'
[Tue Sep 29 19:09:40.961253 2020] [access_compat:error] [pid 1408] [client 84.241.72.212:56528] AH01797: client denied by server configuration: /var/www/nextcloud/config
[Tue Sep 29 19:26:45.207314 2020] [access_compat:error] [pid 8093] [client 62.202.181.172:10409] AH01797: client denied by server configuration: /var/www/nextcloud/config
[Tue Sep 29 19:42:55.709336 2020] [mpm_prefork:notice] [pid 1287] AH00169: caught SIGTERM, shutting down
[Tue Sep 29 19:42:55.796653 2020] [so:warn] [pid 10053] AH01574: module php7_module is already loaded, skipping
[Tue Sep 29 19:42:55.829318 2020] [mpm_prefork:notice] [pid 10067] AH00163: Apache/2.4.29 (Ubuntu) OpenSSL/1.1.1g configured -- resuming normal operations
[Tue Sep 29 19:42:55.829346 2020] [core:notice] [pid 10067] AH00094: Command line: '/usr/sbin/apache2'
[Tue Sep 29 19:48:20.877405 2020] [mpm_prefork:notice] [pid 10067] AH00169: caught SIGTERM, shutting down
[Tue Sep 29 19:48:20.960260 2020] [so:warn] [pid 10814] AH01574: module php7_module is already loaded, skipping
[Tue Sep 29 19:48:21.002422 2020] [mpm_prefork:notice] [pid 10819] AH00163: Apache/2.4.29 (Ubuntu) OpenSSL/1.1.1g configured -- resuming normal operations
[Tue Sep 29 19:48:21.002471 2020] [core:notice] [pid 10819] AH00094: Command line: '/usr/sbin/apache2'
[Tue Sep 29 20:01:23.153243 2020] [access_compat:error] [pid 11930] [client 31.164.62.126:61153] AH01797: client denied by server configuration: /var/www/nextcloud/config
[Tue Sep 29 20:13:35.909971 2020] [access_compat:error] [pid 12302] [client 84.241.67.59:46130] AH01797: client denied by server configuration: /var/www/nextcloud/config
[Tue Sep 29 20:13:35.939886 2020] [access_compat:error] [pid 12841] [client 84.241.67.59:45799] AH01797: client denied by server configuration: /var/www/nextcloud/config
[Tue Sep 29 20:38:18.112881 2020] [core:notice] [pid 10819] AH00052: child pid 16470 exit signal Segmentation fault (11)
[Tue Sep 29 20:38:18.133538 2020] [mpm_prefork:notice] [pid 10819] AH00169: caught SIGTERM, shutting down
[Tue Sep 29 20:38:22.613212 2020] [so:warn] [pid 17790] AH01574: module php7_module is already loaded, skipping
[Tue Sep 29 20:38:27.298741 2020] [mpm_prefork:notice] [pid 17796] AH00163: Apache/2.4.46 (Ubuntu) OpenSSL/1.1.1g configured -- resuming normal operations
[Tue Sep 29 20:38:27.298788 2020] [core:notice] [pid 17796] AH00094: Command line: '/usr/sbin/apache2'
[Tue Sep 29 20:38:54.006836 2020] [access_compat:error] [pid 18047] [client 213.55.224.183:24260] AH01797: client denied by server configuration: /var/www/nextcloud/config
[Tue Sep 29 20:59:22.680200 2020] [access_compat:error] [pid 20119] [client 62.202.182.133:10683] AH01797: client denied by server configuration: /var/www/nextcloud/config
[Tue Sep 29 21:21:17.219779 2020] [access_compat:error] [pid 22914] [client 62.202.182.133:18619] AH01797: client denied by server configuration: /var/www/nextcloud/config

I hope someone from the support Team may be able to support.

@MFGP

I have tested your website.

https://www.cloud.mfgp.ch
redirects to
https://www.cloud.mfgp.ch/core/index.php/login

Where have you edit “core”. That is not correct.
Yes there is a directory “core” but not in this context.

[Tue Sep 29 18:53:07.120824 2020] [access_compat:error] [pid 9535] [client 188.60.222.215:50821] AH01797: client denied by server configuration: /var/www/nextcloud/config

https://stackoverflow.com/questions/12140559/error-with-htaccess-and-mod-rewrite

Have you modified something in an .htaccess ?

Hint:
Perhaps you have restored files to the wrong directories.

Thank you for your reply.

I have not modified any .htaccess nor did I restore files to the wrong directories - at least not that I am aware off. But after the fault already occurred, we’ve updated from php7.2 to 7.4 and apche2 to 2.4.

About two weeks agou I’ve updated NC to 19.0.3. After that it was running normal until a few days ago.

Mobile Desktop and mobile apps seem to work and to synchronise data. Just the access via Webinterface is creating an issue.

Some other interesting info: Looking at the Nextcloud app installed on my mac, the follwoing conflict messages are shown on the admin account:

…and the follwing on the user account:

Interestingly the conflicts are only shown on the admin account.