Impossible to log-in the admin : 524 timeout

Nextcloud version 23.0.1
Operating system and version Ubuntu 20.04
Apache2
PHP version : 7.4.3

The issue i’m facing:
log-in impossible for my admin user profile ! Password recovery goes well, but does not solve the problem. From Linux Firefox browser or Android Ocloud app.
Other users can connect. I can retrieve my password but it does not solve the problem.
This account is the only admin, and does not rely on an e-mail, but on a name.
Been upgraded 3 times to 23.0.1 without result.
Many apps disabled, no change.

First time I’ve seen this error.

Steps to replicate it:

  1. type login ID
  2. type login pass
  3. wait few minutes, then 524: timeout

With “top” command, I can see apache2 and mysqld consuming much resources.
apache2 goes 100 % for 3 secondes, then mysqld stays forever at 10 % or 20 %, then 524.
Rebooting the server does not cure the problem.

The output of my Nextcloud log in Admin > Logging:

141.101.69.239 - - [31/Jan/2022:09:11:22 +0000] "GET /index.php/apps/theming/styles?v=0 HTTP/1.1" 200 1591 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.69.239 - - [31/Jan/2022:09:11:23 +0000] "GET /index.php/svg/core/logo/logo?color=ffffff&v=1 HTTP/1.1" 200 1698 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.68.12 - - [31/Jan/2022:09:11:24 +0000] "GET /apps/files_rightclick/js/script.js?v=02b44d48-0 HTTP/1.1" 200 5510 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
162.158.50.47 - - [31/Jan/2022:09:11:24 +0000] "GET /apps/files_rightclick/js/files.js?v=02b44d48-0 HTTP/1.1" 200 3517 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
162.158.50.17 - - [31/Jan/2022:09:11:25 +0000] "GET /apps/theming/l10n/fr.js?v=02b44d48-0 HTTP/1.1" 200 3803 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
162.158.50.61 - - [31/Jan/2022:09:11:25 +0000] "GET /apps/theming/js/theming.js?v=02b44d48-0 HTTP/1.1" 200 2250 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.68.206 - - [31/Jan/2022:09:11:25 +0000] "GET /core/img/background.png?v=0 HTTP/1.1" 200 11825 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.68.242 - - [31/Jan/2022:09:11:25 +0000] "GET /core/js/dist/login.js?v=02b44d48-0 HTTP/1.1" 200 275376 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.69.239 - - [31/Jan/2022:09:11:25 +0000] "GET /cron.php HTTP/1.1" 200 991 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.68.76 - mireille.xxx@free.fr [31/Jan/2022:09:11:53 +0000] "GET /status.php HTTP/1.1" 200 3063 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
141.101.68.76 - mireille.xxx@free.fr [31/Jan/2022:09:11:21 +0000] "PROPFIND /remote.php/webdav/ HTTP/1.1" 207 1277 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
141.101.69.103 - mireille.xxx@free.fr [31/Jan/2022:09:12:25 +0000] "GET /status.php HTTP/1.1" 200 3062 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
141.101.68.76 - mireille.xxx@free.fr [31/Jan/2022:09:11:53 +0000] "PROPFIND /remote.php/webdav/ HTTP/1.1" 207 1277 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
141.101.69.125 - mireille.xxx@free.fr [31/Jan/2022:09:12:57 +0000] "GET /status.php HTTP/1.1" 200 3060 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
108.162.229.80 - - [31/Jan/2022:09:13:09 +0000] "GET /favicon.ico HTTP/1.1" 404 2389 "https://indivicloud.me/index.php/login" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.69.103 - mireille.xxx@free.fr [31/Jan/2022:09:12:25 +0000] "PROPFIND /remote.php/webdav/ HTTP/1.1" 207 1277 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
108.162.229.52 - mireille.xxx@free.fr [31/Jan/2022:09:13:29 +0000] "GET /status.php HTTP/1.1" 200 3062 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
141.101.69.239 - - [31/Jan/2022:09:11:30 +0000] "POST /index.php/login HTTP/1.1" 303 1313 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.69.125 - mireille.morga@free.fr [31/Jan/2022:09:12:57 +0000] "PROPFIND /remote.php/webdav/ HTTP/1.1" 207 1277 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
141.101.69.239 - - [31/Jan/2022:09:13:49 +0000] "GET /index.php HTTP/1.1" 302 2918 "https://indivicloud.me/" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.69.239 - - [31/Jan/2022:09:13:51 +0000] "GET /index.php/login HTTP/1.1" 200 6238 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
108.162.229.52 - mireille.xxx@free.fr [31/Jan/2022:09:14:01 +0000] "GET /status.php HTTP/1.1" 200 3061 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
141.101.69.239 - - [31/Jan/2022:09:14:04 +0000] "POST /index.php/login HTTP/1.1" 303 2696 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.69.239 - - [31/Jan/2022:09:14:05 +0000] "GET /index.php/login?user=max&direct=1 HTTP/1.1" 200 6231 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.69.239 - - [31/Jan/2022:09:14:06 +0000] "GET /cron.php HTTP/1.1" 200 991 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.69.239 - - [31/Jan/2022:09:13:52 +0000] "GET /cron.php HTTP/1.1" 200 991 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.69.239 - - [31/Jan/2022:09:14:12 +0000] "POST /index.php/login HTTP/1.1" 303 886 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.69.239 - - [31/Jan/2022:09:14:13 +0000] "GET /index.php/login?user=max&direct=1 HTTP/1.1" 200 6237 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
108.162.229.52 - mireille.xxx@free.fr [31/Jan/2022:09:13:29 +0000] "PROPFIND /remote.php/webdav/ HTTP/1.1" 207 1277 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
141.101.69.239 - - [31/Jan/2022:09:14:13 +0000] "GET /cron.php HTTP/1.1" 200 991 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.69.239 - - [31/Jan/2022:09:14:18 +0000] "POST /index.php/login HTTP/1.1" 303 887 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.69.239 - - [31/Jan/2022:09:14:19 +0000] "GET /index.php/login?user=secu&direct=1 HTTP/1.1" 200 6242 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.69.239 - - [31/Jan/2022:09:14:20 +0000] "GET /cron.php HTTP/1.1" 200 991 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.69.239 - mireille.xxx@free.fr [31/Jan/2022:09:14:33 +0000] "GET /status.php HTTP/1.1" 200 3062 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
108.162.229.52 - mireille.xxx@free.fr [31/Jan/2022:09:14:01 +0000] "PROPFIND /remote.php/webdav/ HTTP/1.1" 207 1277 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
141.101.69.239 - - [31/Jan/2022:09:14:34 +0000] "POST /index.php/login HTTP/1.1" 303 2707 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.69.239 - - [31/Jan/2022:09:14:41 +0000] "GET /index.php/login?user=maxime-terrier&direct=1 HTTP/1.1" 200 6297 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.69.239 - - [31/Jan/2022:09:14:42 +0000] "GET /cron.php HTTP/1.1" 200 991 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.69.125 - mireille.xxx@free.fr [31/Jan/2022:09:15:05 +0000] "GET /status.php HTTP/1.1" 200 3062 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
141.101.69.239 - mireille.xxx@free.fr [31/Jan/2022:09:14:33 +0000] "PROPFIND /remote.php/webdav/ HTTP/1.1" 207 1277 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
108.162.229.242 - mireille.xxx@free.fr [31/Jan/2022:09:15:37 +0000] "GET /status.php HTTP/1.1" 200 3062 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
141.101.69.125 - mireille.xxx@free.fr [31/Jan/2022:09:15:05 +0000] "PROPFIND /remote.php/webdav/ HTTP/1.1" 207 1277 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
108.162.229.242 - - [31/Jan/2022:09:15:39 +0000] "POST /index.php/lostpassword/email HTTP/1.1" 200 2714 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
108.162.229.242 - - [31/Jan/2022:09:16:04 +0000] "GET /index.php/lostpassword/reset/form/3RNtoWPXqHdgSteMREsL8/maxime-terrier HTTP/1.1" 200 7892 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
108.162.229.216 - - [31/Jan/2022:09:16:07 +0000] "GET /index.php/css/icons/icons-vars.css?v=1643620566 HTTP/1.1" 200 23135 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.68.140 - - [31/Jan/2022:09:16:07 +0000] "GET /index.php/css/core/46fe-ddf6-server.css?v=b92d206521717ac032f8aa58d3c7ff2f-02b44d48-0 HTTP/1.1" 200 22855 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
108.162.229.242 - - [31/Jan/2022:09:16:07 +0000] "GET /index.php/apps/theming/styles?v=0 HTTP/1.1" 200 1591 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
162.158.50.49 - - [31/Jan/2022:09:16:07 +0000] "GET /index.php/css/core/46fe-ddf6-css-variables.css?v=b92d206521717ac032f8aa58d3c7ff2f-02b44d48-0 HTTP/1.1" 200 3514 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
108.162.229.52 - mireille.xxx@free.fr [31/Jan/2022:09:16:09 +0000] "GET /status.php HTTP/1.1" 200 3061 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
108.162.229.242 - - [31/Jan/2022:09:16:08 +0000] "GET /cron.php HTTP/1.1" 200 991 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
108.162.229.242 - mireille.xxx@free.fr [31/Jan/2022:09:15:37 +0000] "PROPFIND /remote.php/webdav/ HTTP/1.1" 207 1277 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
108.162.229.242 - - [31/Jan/2022:09:16:23 +0000] "POST /index.php/lostpassword/set/3RNtoWPXqHdgSteMREsL8/maxime-xxx HTTP/1.1" 200 3364 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
108.162.229.242 - - [31/Jan/2022:09:16:34 +0000] "POST /index.php/login HTTP/1.1" 303 2706 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
108.162.229.242 - - [31/Jan/2022:09:16:40 +0000] "GET /index.php/login?user=maxime-terrier&direct=1 HTTP/1.1" 200 6247 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.68.76 - mireille.xxx@free.fr [31/Jan/2022:09:16:41 +0000] "GET /status.php HTTP/1.1" 200 3063 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
108.162.229.52 - mireille.xxx@free.fr [31/Jan/2022:09:16:09 +0000] "PROPFIND /remote.php/webdav/ HTTP/1.1" 207 1277 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
108.162.229.242 - - [31/Jan/2022:09:16:41 +0000] "GET /cron.php HTTP/1.1" 200 991 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
108.162.229.242 - - [31/Jan/2022:09:16:54 +0000] "POST /index.php/lostpassword/email HTTP/1.1" 200 2716 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
108.162.229.242 - - [31/Jan/2022:09:17:01 +0000] "GET /index.php/lostpassword/reset/form/fFwvt3BaQ6pQpG9HmMry6/maxime-xxx HTTP/1.1" 200 7894 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
162.158.50.25 - - [31/Jan/2022:09:17:02 +0000] "GET /index.php/css/icons/icons-vars.css?v=1643620567 HTTP/1.1" 200 23135 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
108.162.229.242 - - [31/Jan/2022:09:17:03 +0000] "GET /index.php/svg/core/logo/logo?color=ffffff&v=1 HTTP/1.1" 200 1698 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
108.162.229.242 - - [31/Jan/2022:09:17:09 +0000] "POST /index.php/lostpassword/set/fFwvt3BaQ6pQpG9HmMry6/maxime-xxx HTTP/1.1" 200 2772 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
108.162.229.242 - - [31/Jan/2022:09:17:03 +0000] "GET /cron.php HTTP/1.1" 200 991 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.69.59 - mireille.xxx@free.fr [31/Jan/2022:09:17:13 +0000] "GET /status.php HTTP/1.1" 200 3062 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
108.162.229.242 - - [31/Jan/2022:09:17:14 +0000] "POST /index.php/lostpassword/set/fFwvt3BaQ6pQpG9HmMry6/maxime-xxx HTTP/1.1" 200 1554 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.68.76 - mireille.xxx@free.fr [31/Jan/2022:09:16:41 +0000] "PROPFIND /remote.php/webdav/ HTTP/1.1" 207 1277 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
108.162.229.242 - - [31/Jan/2022:09:17:21 +0000] "GET / HTTP/1.1" 200 565 "-" "Mozilla/5.0 (iPhone; CPU iPhone OS 9_3_5 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13G36 Safari/601.1"
141.101.69.235 - - [31/Jan/2022:09:17:22 +0000] "GET /index.php HTTP/1.1" 302 3472 "-" "Mozilla/5.0 (iPhone; CPU iPhone OS 9_3_5 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13G36 Safari/601.1"
141.101.69.235 - - [31/Jan/2022:09:17:23 +0000] "GET /index.php/login HTTP/1.1" 200 4682 "-" "Mozilla/5.0 (iPhone; CPU iPhone OS 9_3_5 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13G36 Safari/601.1"
141.101.69.235 - mireille.xxx@free.fr [31/Jan/2022:09:17:45 +0000] "GET /status.php HTTP/1.1" 200 3062 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
141.101.69.59 - mireille.xxx@free.fr [31/Jan/2022:09:17:13 +0000] "PROPFIND /remote.php/webdav/ HTTP/1.1" 207 1277 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
141.101.69.59 - mireille.xxx@free.fr [31/Jan/2022:09:18:17 +0000] "GET /status.php HTTP/1.1" 200 3061 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
141.101.69.235 - mireille.xxx@free.fr [31/Jan/2022:09:17:45 +0000] "PROPFIND /remote.php/webdav/ HTTP/1.1" 207 1277 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
141.101.69.103 - mireille.xxx@free.fr [31/Jan/2022:09:18:49 +0000] "GET /status.php HTTP/1.1" 200 3062 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
141.101.69.59 - mireille.xxx@free.fr [31/Jan/2022:09:18:17 +0000] "PROPFIND /remote.php/webdav/ HTTP/1.1" 207 1277 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
141.101.69.161 - mireille.xxx@free.fr [31/Jan/2022:09:19:21 +0000] "GET /status.php HTTP/1.1" 200 3063 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"
108.162.229.242 - - [31/Jan/2022:09:17:25 +0000] "POST /index.php/login HTTP/1.1" 303 1315 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
141.101.69.103 - mireille.xxx@free.fr [31/Jan/2022:09:18:49 +0000] "PROPFIND /remote.php/webdav/ HTTP/1.1" 207 1277 "-" "Mozilla/5.0 (Linux) mirall/2.4.1"


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

?php
$CONFIG = array (
  'instanceid' => 'ocbb9oa5vci9',
  'passwordsalt' => 'Ca0jwOhhBgPJ0pkhNQZ1wxZ920SCbO',
  'secret' => 'os/jTbVUA+bFeSQadBuxZr9b7ulxWee+Lxk2gZcoI/Idq9Pm',
  'trusted_domains' => 
  array (
    0 => 'xxx.me',
    1 => '127.0.0.1',
  ),
  'datadirectory' => '/home/secu/nextcloud-2200/data',
  'dbtype' => 'mysql',
  'version' => '23.0.1.2',
  'overwrite.cli.url' => 'http://192.168.2.3',
  'dbname' => 'nc',
  'dbhost' => 'localhost:3306',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'dbuser' => 'secu',
  'dbpassword' => 'dfsdfsdfsdfds',
  'installed' => true,
  'mail_from_address' => 'contact',
  'mail_smtpmode' => 'smtp',
  'mail_sendmailmode' => 'smtp',
  'mail_domain' => 'xxx.me',
  'mail_smtpauthtype' => 'LOGIN',
  'mail_smtphost' => 'mail.gandi.net',
  'mail_smtpport' => '587',
  'mail_smtpauth' => 1,
  'mail_smtpname' => 'tech@xxx.me',
  'mail_smtppassword' => 'qsdfsdfsdfsdf',
  'mail_smtpsecure' => 'tls',
  'default_language' => 'fr_FR',
  'force_language' => 'fr_FR',
  'default_locale' => 'fr_FR',
  'force_locale' => 'fr_FR',
  'maintenance' => false,
  'updater.secret' => '$2y$10$VVZiqWkH1ZzNB6o/q2crVO6V91xAFUOdUhhnFRrops7UmdTcqd6/q',
  'loglevel' => 1,
  'logfile' => '/home/secu/nextcloud-log/nextcloud.log',
  'theme' => '',
  'app_install_overwrite' => 
  array (
    0 => 'documents',
  ),
);

The output of your Apache/nginx/system log in /var/log/apache2/error.log:

empty, no errors