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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): 28.0.3
Operating system and version (eg, Ubuntu 20.04): Unraid OS 6.12.8
PHP version (eg, 7.4): 8.2
Docker container:
lscr.io/linuxserver/nextcloud
The issue you are facing:
root@3203889da4c3:/# occ files:scan --all
{“reqId”:“9DC2bJvA4n84CO4VVTyw”,“level”:1,“time”:“2024-03-06T15:21:28+00:00”,“remoteAddr”:“”,“user”:“–”,“app”:“admin_audit”,“method”:“”,“url”:“–”,“message”:“Console command executed: files:scan --all”,“userAgent”:“–”,“version”:“28.0.3.2”,“data”:{“app”:“admin_audit”}}
Starting scan for user 1 out of 5 (A_____)
Starting scan for user 2 out of 5 (E_____)
Exception during scan: File entry could not be inserted but could also not be selected with getId() in order to perform an update. Please try again.
#0 /app/www/public/lib/private/Files/Cache/Scanner.php(307): OC\Files\Cache\Cache->insert()
#1 /app/www/public/lib/private/Files/Cache/Scanner.php(240): OC\Files\Cache\Scanner->addToCache()
#2 /app/www/public/lib/private/Files/Cache/Scanner.php(480): OC\Files\Cache\Scanner->scanFile()
#3 /app/www/public/lib/private/Files/Cache/Scanner.php(404): OC\Files\Cache\Scanner->handleChildren()
#4 /app/www/public/lib/private/Files/Cache/Scanner.php(409): OC\Files\Cache\Scanner->scanChildren()
#5 /app/www/public/lib/private/Files/Cache/Scanner.php(409): OC\Files\Cache\Scanner->scanChildren()
#6 /app/www/public/lib/private/Files/Cache/Scanner.php(409): OC\Files\Cache\Scanner->scanChildren()
#7 /app/www/public/lib/private/Files/Cache/Scanner.php(409): OC\Files\Cache\Scanner->scanChildren()
#8 /app/www/public/lib/private/Files/Cache/Scanner.php(409): OC\Files\Cache\Scanner->scanChildren()
#9 /app/www/public/lib/private/Files/Cache/Scanner.php(354): OC\Files\Cache\Scanner->scanChildren()
#10 /app/www/public/lib/private/Files/Utils/Scanner.php(277): OC\Files\Cache\Scanner->scan()
#11 /config/www/nextcloud/apps/files/lib/Command/Scan.php(180): OC\Files\Utils\Scanner->scan()
#12 /config/www/nextcloud/apps/files/lib/Command/Scan.php(241): OCA\Files\Command\Scan->scanFiles()
#13 /app/www/public/3rdparty/symfony/console/Command/Command.php(298): OCA\Files\Command\Scan->execute()
#14 /app/www/public/core/Command/Base.php(177): Symfony\Component\Console\Command\Command->run()
#15 /app/www/public/3rdparty/symfony/console/Application.php(1040): OC\Core\Command\Base->run()
#16 /app/www/public/3rdparty/symfony/console/Application.php(301): Symfony\Component\Console\Application->doRunCommand()
#17 /app/www/public/3rdparty/symfony/console/Application.php(171): Symfony\Component\Console\Application->doRun()
#18 /app/www/public/lib/private/Console/Application.php(213): Symfony\Component\Console\Application->run()
#19 /app/www/public/console.php(100): OC\Console\Application->run()
#20 /app/www/public/occ(11): require_once(‘…’)
#21 {main}
Starting scan for user 3 out of 5 (J_____)
Starting scan for user 4 out of 5 (K____)
Starting scan for user 5 out of 5 (M___)
Error during scan: chmod(): Operation not permitted
±--------±------±----±--------±--------±-------±-------------+
| Folders | Files | New | Updated | Removed | Errors | Elapsed time |
±--------±------±----±--------±--------±-------±-------------+
| 672 | 22196 | 0 | 5612 | 0 | 2 | 00:00:55 |
±--------±------±----±--------±--------±-------±-------------+
Error during scan: chmod(): Operation not permitted
Is this the first time you’ve seen this error? (Y/N):
Yes
Steps to replicate it:
- IDK
The output of your Nextcloud log in Admin > Logging:
{
"reqId": "4tNAidWgylx8zoj1qIz7",
"level": 3,
"time": "2024-03-06T15:31:59+00:00",
"remoteAddr": "aaa.bbb.ccc.ddd",
"user": "A____",
"app": "PHP",
"method": "GET",
"url": "/settings/admin/logging",
"message": "chmod(): Operation not permitted at /app/www/public/lib/private/Log/File.php#84",
"userAgent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36 OPR/107.0.0.0",
"version": "28.0.3.2",
"data": {
"app": "PHP"
},
"id": "65e88c7283da1"
}
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'memcache.local' => '\\OC\\Memcache\\APCu',
'memcache.distributed' => '\\OC\\Memcache\\Redis',
'memcache.locking' => '\\OC\\Memcache\\Redis',
'redis' =>
array (
'host' => '192.168.1.ddd',
'port' => 6379,
'password' => 'sensitive',
),
'datadirectory' => '/data',
'instanceid' => 'ocj49jkucnbm',
'passwordsalt' => 'sensitive',
'secret' => 'sensitive',
'trusted_domains' =>
array (
0 => 'localhost',
1 => 'cloud.sensitive.eu',
2 => '192.168.1.ddd',
),
'trusted_proxies' =>
array (
0 => '127.0.0.1',
1 => '192.168.1.ddd',
),
'dbtype' => 'pgsql',
'version' => '28.0.3.2',
'overwrite.cli.url' => 'https://cloud.sensitive.eu',
'dbname' => 'cloud',
'dbhost' => '192.168.1.ddd',
'dbport' => '5432',
'dbtableprefix' => 'oc_',
'dbuser' => 'sensitive',
'dbpassword' => 'sensitive',
'installed' => true,
'integrity.check.disabled' => false,
'mail_from_address' => 'sensitive',
'mail_smtpmode' => 'smtp',
'mail_sendmailmode' => 'smtp',
'mail_domain' => 'gmail.com',
'mail_smtpauthtype' => 'LOGIN',
'mail_smtphost' => 'smtp.gmail.com',
'mail_smtpport' => '465',
'mail_smtpauth' => 1,
'mail_smtpname' => 'sensitive@gmail.com',
'mail_smtppassword' => 'sensitive',
'mail_smtpsecure' => 'ssl',
'defaultapp' => 'files',
'default_phone_region' => 'CZ',
'updater.release.channel' => 'stable',
'maintenance' => false,
'loglevel' => 0,
'logfile' => '/var/log/nextcloud/nextcloud.log',
'twofactor_enforced' => 'false',
'twofactor_enforced_groups' =>
array (
0 => 'admin',
),
'twofactor_enforced_excluded_groups' =>
array (
),
'theme' => '',
'auth.bruteforce.protection.enabled' => false,
'preview_max_memory' => '512',
'preview_concurrency_all' => 16,
'preview_concurrency_new' => 8,
'enable_previews' => true,
'preview_max_x' => 2048,
'preview_max_y' => 2048,
'enablePreviewProviders' =>
array (
0 => 'OC\\Preview\\Image',
1 => 'OC\\Preview\\Movie',
2 => 'OC\\Preview\\MKV',
3 => 'OC\\Preview\\MP4',
4 => 'OC\\Preview\\AVI',
5 => 'OC\\Preview\\mov',
6 => 'OC\\Preview\\PNG',
7 => 'OC\\Preview\\JPEG',
8 => 'OC\\Preview\\GIF',
9 => 'OC\\Preview\\BMP',
10 => 'OC\\Preview\\XBitmap',
11 => 'OC\\Preview\\PDF',
12 => 'OC\\Preview\\MP3',
13 => 'OC\\Preview\\TXT',
14 => 'OC\\Preview\\MarkDown',
15 => 'OC\\Preview\\3GP',
16 => 'OC\\Preview\\JPG',
),
'filelocking.enabled' => 'true',
'upgrade.disable-web' => 'true',
'appstoreenabled' => 'true',
'maintenance_window_start' => 1,
);
The output of your Apache/nginx/system log in /var/log/____:
PASTE HERE
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.
(https://pastebin.com/fCPy1JkK)
