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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, 29.0.5): 29.0.1.1
Operating system and version (eg, Ubuntu 29.04): Docker on Open Media Vault server
Apache or nginx version (eg, Apache 2.4.25): 2.4.59
PHP version (eg, 8.3): 8.2.18
The issue you are facing:
When I try to log into the AIO Interface at port 8080, either by following the link from the admin settings, or directly entering the ip, or the DNS, I receive a “Slim Application Error” with no further details.
Is this the first time you’ve seen this error? (Y/N): N
Steps to replicate it:
- Attempt to log in to AIO Interface
The output of your Nextcloud log in Admin > Logging:
\\Connection","type":"->","args":["DELETE FROM \"oc_appconfig\" WHERE (\"appid\" = :dcValue1) AND (\"configkey\" = :dcValue2)",["core","cronErrors"],[2,2]]},{"file":"/var/www/html/lib/private/DB/QueryBuilder/QueryBuilder.php","line":280,"function":"execute","class":"Doctrine\\DBAL\\Query\\QueryBuilder","type":"->","args":[]},{"file":"/var/www/html/lib/private/DB/QueryBuilder/QueryBuilder.php","line":326,"function":"execute","class":"OC\\DB\\QueryBuilder\\QueryBuilder","type":"->","args":[]},{"file":"/var/www/html/lib/private/AppConfig.php","line":1106,"function":"executeStatement","class":"OC\\DB\\QueryBuilder\\QueryBuilder","type":"->","args":[]},{"file":"/var/www/html/lib/private/AllConfig.php","line":232,"function":"deleteKey","class":"OC\\AppConfig","type":"->","args":["core","cronErrors"]},{"file":"/var/www/html/lib/base.php","line":754,"function":"deleteAppValue","class":"OC\\AllConfig","type":"->","args":["core","cronErrors"]},{"file":"/var/www/html/lib/base.php","line":1181,"function":"init","class":"OC","type":"::","args":[]},{"file":"/var/www/html/cron.php","line":58,"args":["/var/www/html/lib/base.php"],"function":"require_once"}],"File":"/var/www/html/3rdparty/doctrine/dbal/src/Driver/PDO/PgSQL/Driver.php","Line":34}}},"message":"An exception occurred in the driver: SQLSTATE[08006] [7] could not translate host name \"nextcloud-aio-database\" to address: Try again","exception":{},"CustomMessage":"An exception occurred in the driver: SQLSTATE[08006] [7] could not translate host name \"nextcloud-aio-database\" to address: Try again"}}
{"reqId":"x9N3C8PHzH9oLgf0CLVn","level":2,"time":"2024-07-02T20:35:42+00:00","remoteAddr":"154.47.25.18","user":"admin","app":"suspicious_login","method":"POST","url":"/login","message":"Could not predict suspiciousness: No models found","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:127.0) Gecko/20100101 Firefox/127.0","version":"29.0.1.1","data":{"app":"suspicious_login"}}
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'one-click-instance' => true,
'one-click-instance.user-limit' => 100,
'memcache.local' => '\\OC\\Memcache\\APCu',
'apps_paths' =>
array (
0 =>
array (
'path' => '/var/www/html/apps',
'url' => '/apps',
'writable' => false,
),
1 =>
array (
'path' => '/var/www/html/custom_apps',
'url' => '/custom_apps',
'writable' => true,
),
),
'appsallowlist' => false,
'check_data_directory_permissions' => false,
'memcache.distributed' => '\\OC\\Memcache\\Redis',
'memcache.locking' => '\\OC\\Memcache\\Redis',
'redis' =>
array (
'host' => 'nextcloud-aio-redis',
'password' => 'REDACTED',
'port' => 6379,
),
'overwritehost' => 'REDACTED',
'overwriteprotocol' => 'https',
'passwordsalt' => 'REDACTED',
'secret' => 'REDACTED',
'trusted_domains' =>
array (
0 => 'localhost',
1 => 'REDACTED',
),
'datadirectory' => '/mnt/ncdata',
'dbtype' => 'pgsql',
'version' => '29.0.1.1',
'overwrite.cli.url' => 'REDACTED',
'dbname' => 'nextcloud_database',
'dbhost' => 'nextcloud-aio-database',
'dbport' => '',
'dbtableprefix' => 'oc_',
'dbuser' => 'oc_nextcloud',
'dbpassword' => 'REDACTED',
'installed' => true,
'default_phone_region' => 'US',
'instanceid' => 'ocq9fnyg6m0u',
'maintenance' => false,
'updatedirectory' => '/nc-updater',
'loglevel' => '2',
'app_install_overwrite' =>
array (
0 => 'nextcloud-aio',
),
'log_type' => 'file',
'logfile' => '/var/www/html/data/nextcloud.log',
'log_rotate_size' => '10485760',
'log.condition' =>
array (
'apps' =>
array (
0 => 'admin_audit',
),
),
'preview_max_x' => '2048',
'preview_max_y' => '2048',
'jpeg_quality' => '60',
'enabledPreviewProviders' =>
array (
1 => 'OC\\Preview\\Image',
2 => 'OC\\Preview\\MarkDown',
3 => 'OC\\Preview\\MP3',
4 => 'OC\\Preview\\TXT',
5 => 'OC\\Preview\\OpenDocument',
6 => 'OC\\Preview\\Movie',
7 => 'OC\\Preview\\Krita',
0 => 'OC\\Preview\\Imaginary',
),
'enable_previews' => true,
'upgrade.disable-web' => true,
'mail_smtpmode' => 'smtp',
'trashbin_retention_obligation' => 'auto, 30',
'versions_retention_obligation' => 'auto, 30',
'activity_expire_days' => '30',
'simpleSignUpLink.shown' => false,
'share_folder' => '/Shared',
'one-click-instance.link' => 'https://nextcloud.com/all-in-one/',
'upgrade.cli-upgrade-link' => 'https://github.com/nextcloud/all-in-one/discussions/2726',
'maintenance_window_start' => 100,
'allow_local_remote_servers' => true,
'davstorage.request_timeout' => 3600,
'htaccess.RewriteBase' => '/',
'dbpersistent' => false,
'auth.bruteforce.protection.enabled' => true,
'ratelimit.protection.enabled' => true,
'files_external_allow_create_new_local' => true,
'trusted_proxies' =>
array (
0 => '127.0.0.1',
1 => '::1',
10 => '192.168.240.1/32',
),
'preview_imaginary_url' => 'http://nextcloud-aio-imaginary:9000',
'preview_imaginary_key' => '6c76d2f7fb1d9e324bb1f3a2a5c7f190687b9c0ed80a4e52',
'mail_sendmailmode' => 'smtp',
'mail_from_address' => 'REDACTED',
'mail_domain' => 'gmail.com',
'mail_smtphost' => 'smtp.gmail.com',
'mail_smtpport' => '465',
'mail_smtpauth' => 1,
'mail_smtpname' => 'REDACTED',
'mail_smtppassword' => 'REDACTED ',
);
The output of your Apache/nginx/system log in /var/log/____:
Waiting for Nextcloud to start...
Waiting for Nextcloud to start...
Waiting for Nextcloud to start...
Waiting for Nextcloud to start...
Connection to nextcloud-aio-nextcloud (192.168.240.8) 9000 port [tcp/*] succeeded!
{"level":"info","ts":1719879427.381502,"msg":"using provided configuration","config_file":"/tmp/Caddyfile","config_adapter":""}
[Mon Jul 01 20:17:07.392603 2024] [mpm_event:notice] [pid 74:tid 139828886182664] AH00489: Apache/2.4.59 (Unix) configured -- resuming normal operations
[Mon Jul 01 20:17:07.392914 2024] [core:notice] [pid 74:tid 139828886182664] AH00094: Command line: '/usr/local/apache2/bin/httpd -D FOREGROUND'
Connection to nextcloud-aio-nextcloud (192.168.240.8) 9000 port [tcp/*] succeeded!
{"level":"info","ts":1719952374.3786087,"msg":"using provided configuration","config_file":"/tmp/Caddyfile","config_adapter":""}
[Tue Jul 02 16:32:54.392722 2024] [mpm_event:notice] [pid 34:tid 140482142169864] AH00489: Apache/2.4.59 (Unix) configured -- resuming normal operations
[Tue Jul 02 16:32:54.393366 2024] [core:notice] [pid 34:tid 140482142169864] AH00094: Command line: '/usr/local/apache2/bin/httpd -D FOREGROUND'
END OF LINE
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.
{"reqId":"0fljylXUWqvwZIvgT03D","level":3,"time":"2024-05-27T20:40:36+00:00","remoteAddr":"","user":"admin","app":"PHP","method":"","url":"--","message":"fopen(/var/www/html/config/config.php): Failed to open stream: No such file or directory at /var/www/html/lib/private/Config.php#225","userAgent":"--","version":"28.0.5.1","data":{"app":"PHP"},"id":"668467ef91a5a"}
[PHP] Error: Optional parameter $userId declared before required parameter $path is implicitly treated as a required parameter at /var/www/html/custom_apps/deck/lib/Service/ConfigService.php#234
GET /index.php/apps/notify_push/test/version
from 74.215.23.9 by -- at May 27, 2024, 4:45:12 PM
[core] Error: Error while running background job OCA\Theming\Jobs\MigrateBackgroundImages (id: 60, arguments: {"stage":"prepare"})
from ? by -- at May 27, 2024, 4:45:13 PM
[index] Error: Could not get appdata folder for theming
GET /apps/theming/icon?v=b6589fc6
from 149.88.105.225 by -- at May 27, 2024, 4:48:25 PM