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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, 20.0.5): 27.0.1
Operating system and version (eg, Ubuntu 20.04): Ubuntu 22.04
Apache or nginx version (eg, Apache 2.4.25): Apache
PHP version (eg, 7.4): php 8.1
The issue you are facing:
There are regular errors in the error log. Cannot see face fotos in photos app.
Is this the first time you’ve seen this error? (Y/N): Y
Steps to replicate it:
- I have tried to configure redis and set parameter in config.php. It was not working, so I switched back to former configuration.
The output of your Nextcloud log in Admin > Logging:
{"reqId":"KNMUKiDrMm9fp2ff0sTJ","level":2,"time":"2023-08-08T07:25:04+00:00","remoteAddr":"","user":"--","app":"OC\\Log\\Rotate","method":"","url":"--","message":"Log file \"/var/www/html/data/nextcloud.log\" was over 104857600 bytes, moved to \"/var/www/html/data/nextcloud.log.1\"","userAgent":"--","version":"27.0.1.2","data":{"app":"OC\\Log\\Rotate"}}
{"reqId":"n29372436kALwODSe2U9","level":4,"time":"2023-08-08T07:25:10+00:00","remoteAddr":"79.244.35.66","user":"--","app":"no app in context","method":"POST","url":"/index.php/login/v2/poll","message":"Could not boot notify_push: Connection refused","userAgent":"Mozilla/5.0 (Linux) mirall/3.9.1-20230725.181132.d02a998aa-1.0~jammy1 (Nextcloud, ubuntu-5.19.0-50-generic ClientArchitecture: x86_64 OsArchitecture: x86_64)","version":"27.0.1.2","exception":{"Exception":"RedisException","Message":"Connection refused","Code":0,"Trace":[{"file":"/var/www/html/lib/private/RedisFactory.php","line":137,"function":"pconnect","class":"Redis","type":"->","args":["127.0.0.1",6379,0,null,0,0]},
....
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
Have changed the secrets!
<?php
$CONFIG = array (
'passwordsalt' => 'adsfsdafdsfadsfadsfadsfaadsfsd',
'secret' => 'dasasdasfdsfadsfadsfdsaf',
'trusted_domains' =>
array (
0 => 'localhost',
5 => 'nextcloudpi.local',
7 => 'nextcloudpi',
8 => 'nextcloudpi.lan',
1 => '172.18.0.6',
6 => '192.168.103.44',
20 => 'cloud.bardhome.de',
12 => 'bardhome.de',
21 => 'bardhome.spdns.de',
22 => '192.168.103.44',
11 => '79.244.33.204',
3 => 'dbe5e509ecaf',
14 => 'dbe5e509ecaf',
'' => '01f946771284',
15 => '79.244.33.204',
),
'dbtype' => 'mysql',
'version' => '27.0.1.2',
'dbname' => 'nextcloud',
'dbhost' => 'nc_mariadb',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => 'asdfdsaf',
'dbpassword' => 'sdfasdafdsfsdafsdaf',
'installed' => true,
'instanceid' => 'oc7gsdafse1',
'overwrite.cli.url' => 'https://asdsdfasdf.de',
'overwriteprotocol' => 'https',
'default_phone_region' => 'DE',
'trusted_proxies' =>
array (
0 => '192.168.103.33',
2 => '127.0.0.1',
1 => 'localhost',
11 => '127.0.0.1',
12 => '::1',
13 => 'dbasdf',
14 => '172.18.0.6',
15 => '79.244.33.204',
),
'loglevel' => 2,
'maintenance' => false,
'mail_domain' => 'regenpost.de',
'mail_from_address' => 'nextcloud',
'mail_smtpmode' => 'smtp',
'mail_sendmailmode' => 'smtp',
'mail_smtpauth' => 1,
'mail_smtphost' => 'masdfsdfet',
'mail_smtpport' => '465',
'mail_smtpname' => 'catchall@rsadfsafst.de',
'mail_smtppassword' => 'ddfssassdffds',
'app_install_overwrite' =>
array (
0 => 'files_external_onedrive',
1 => 'facerecognition',
),
);
The output of your Apache/nginx/system log in /var/log/____:
none
PASTE HERE
Output errors in nextcloud.log in /var/www/ or as admin user in top right menu, filtering for errors. Use a pastebin service if necessary.
PASTE HERE