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Sorry to hear you’re facing problems 
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In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
example
Or for longer, use three backticks above and below the code snippet:
longer
example
here
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 
Nextcloud version (eg, 18.0.2): 19.0.0
Operating system and version (eg, Ubuntu 20.04): Raspbian GNU/Linux 10 (buster)
Apache or nginx version (eg, Apache 2.4.25): nginx/1.14.2
PHP version (eg, 7.1): 7.3
The issue you are facing:
Yesterday I upgraded from 18.0.6 to nextcloud 19.0.0.12 and while checking afterwards through my admin user I noticed that Settings->Administration->Logging is not giving the expected error lines but only the turning wheel, there is also no timeout
Is this the first time you’ve seen this error? (Y/N): Y
Steps to replicate it:
- logon as administrator goto Settings
- then under Administration click on the Logging entry
The output of your Nextcloud log in Admin > Logging: Can’t provide as that is the issue I’m facing
PASTE HERE
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'instanceid' => '5239cfd08eb5a',
'passwordsalt' => 'secret',
'datadirectory' => '/data/www/nextcloud/data',
'dbname' => 'nextcloud',
'dbtype' => 'mysql',
'dbhost' => 'localhost',
'dbuser' => 'nextcloud',
'dbpassword' => 'secret',
'version' => '19.0.0.12',
'installed' => true,
'forcessl' => true,
'theme' => '',
'maintenance' => false,
'trusted_domains' =>
array (
0 => 'nextcloud.giesoft.org',
),
'check_for_working_webdav' => false,
'loglevel' => 1,
'secret' => 'secret',
'defaultapp' => 'calendar',
'memcache.local' => '\\OC\\Memcache\\APCu',
'filelocking.enabled' => 'true',
'mail_smtpmode' => 'sendmail',
'mail_sendmailmode' => 'smtp',
'mysql.utf8mb4' => true,
'overwrite.cli.url' => 'https://nextcloud.giesoft.org',
);
The output of your Apache/nginx/system log in /var/log/____:
127.0.0.1 - - [24/Jun/2020:16:28:29 +0100] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.0" 304 0 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:77.0) Gecko/20100101 Firefox/77.0"
127.0.0.1 - - [24/Jun/2020:16:28:39 +0100] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.0" 304 0 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:77.0) Gecko/20100101 Firefox/77.0"
127.0.0.1 - - [24/Jun/2020:16:28:56 +0100] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.0" 304 0 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:77.0) Gecko/20100101 Firefox/77.0"
127.0.0.1 - - [24/Jun/2020:16:29:00 +0100] "GET /settings/admin/logging HTTP/1.0" 200 25517 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:77.0) Gecko/20100101 Firefox/77.0"
127.0.0.1 - - [24/Jun/2020:16:29:04 +0100] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.0" 200 74 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:77.0) Gecko/20100101 Firefox/77.0"