Support intro
Sorry to hear you’re facing problems. 
The community help forum (help.nextcloud.com) is for home and non-enterprise users. Support is provided by other community members on a best effort / “as available” basis. All of those responding are volunteering their time to help you.
If you’re using Nextcloud in a business/critical setting, paid and SLA-based support services can be accessed via portal.nextcloud.com where Nextcloud engineers can help ensure your business keeps running smoothly.
Getting help
In order to help you as efficiently (and quickly!) as possible, please fill in as much of the below requested information as you can.
Before clicking submit: Please check if your query is already addressed via the following resources:
- Official documentation (searchable and regularly updated)
- How to topics and FAQs
- Forum search
(Utilizing these existing resources is typically faster. It also helps reduce the load on our generous volunteers while elevating the signal to noise ratio of the forums otherwise arising from the same queries being posted repeatedly).
The Basics
- Nextcloud Server version (e.g., 29.x.x):
- latest
- Operating system and version (e.g., Ubuntu 24.04):
Ubuntu 24.04
- Web server and version (e.g, Apache 2.4.25):
Apache latest
- Reverse proxy and version _(e.g. nginx 1.27.2)
replace me
- PHP version (e.g, 8.3):
8.4
- Is this the first time you’ve seen this error? (Yes / No):
Yes
- When did this problem seem to first start?
After disk full failed borg backup
- Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
AIO
- Are you using CloudfIare, mod_security, or similar? (Yes / No)
No
Summary of the issue you are facing:
[Nextcloud has a bug that allows a backup to occur even without enough disk space leading to Slim Application Error instead of soft restart. This corrupted my instance and I am trying to recover it.]
Steps to replicate it (hint: details matter!):
-
Attempt borg backup
-
Disk full causes borg backup failure
-
Unable to access AIO panel nothing displays
-
Remove cache and other unessary files to free up space
-
AIO now displays the Slim Application Error
-
Borg backup is corrupt because its incomplete
Log entries
Nextcloud
NOTICE: PHP message: Slim Application Error
Type: JsonException
Code: 4
Message: Syntax error
File: /var/www/docker-aio/php/src/Data/ConfigurationManager.php
Line: 17
Trace: #0 /var/www/docker-aio/php/src/Data/ConfigurationManager.php(17): json_decode('<?php\n$CONFIG =...', true, 512, 4194304)
#1 /var/www/docker-aio/php/src/Data/ConfigurationManager.php(1042): AIO\Data\ConfigurationManager->GetConfig()
#2 /var/www/docker-aio/php/src/Data/ConfigurationManager.php(1088): AIO\Data\ConfigurationManager->GetCommunityContainers()
#3 /var/www/docker-aio/php/src/ContainerDefinitionFetcher.php(44): AIO\Data\ConfigurationManager->GetEnabledCommunityContainers()
#4 /var/www/docker-aio/php/src/ContainerDefinitionFetcher.php(352): AIO\ContainerDefinitionFetcher->GetDefinition()
#5 /var/www/docker-aio/php/src/ContainerDefinitionFetcher.php(25): AIO\ContainerDefinitionFetcher->FetchDefinition()
#6 /var/www/docker-aio/php/src/Docker/DockerActionManager.php(978): AIO\ContainerDefinitionFetcher->GetContainerById('nextcloud-aio-a...')
#7 /var/www/docker-aio/php/public/index.php(150): AIO\Docker\DockerActionManager->isLoginAllowed()
#8 /var/www/docker-aio/php/vendor/slim/slim/Slim/Handlers/Strategies/RequestResponse.php(39): Closure->{closure:/var/www/docker-aio/php/public/index.php:145}(Object(GuzzleHttp\Psr7\ServerRequest), Object(GuzzleHttp\Psr7\Response), Array)
#9 /var/www/docker-aio/php/vendor/slim/slim/Slim/Routing/Route.php(362): Slim\Handlers\Strategies\RequestResponse->__invoke(Object(Closure), Object(GuzzleHttp\Psr7\ServerRequest), Object(GuzzleHttp\Psr7\Response), Array)
#10 /var/www/docker-aio/php/vendor/slim/slim/Slim/MiddlewareDispatcher.php(73): Slim\Routing\Route->handle(Object(GuzzleHttp\Psr7\ServerRequest))
#11 /var/www/docker-aio/php/vendor/slim/slim/Slim/MiddlewareDispatcher.php(73): Slim\MiddlewareDispatcher->handle(Object(GuzzleHttp\Psr7\ServerRequest))
#12 /var/www/docker-aio/php/vendor/slim/slim/Slim/Routing/Route.php(321): Slim\MiddlewareDispatcher->handle(Object(GuzzleHttp\Psr7\ServerRequest))
#13 /var/www/docker-aio/php/vendor/slim/slim/Slim/Routing/RouteRunner.php(74): Slim\Routing\Route->run(Object(GuzzleHttp\Psr7\ServerRequest))
#14 /var/www/docker-aio/php/vendor/slim/csrf/src/Guard.php(482): Slim\Routing\RouteRunner->handle(Object(GuzzleHttp\Psr7\ServerRequest))
#15 /var/www/docker-aio/php/vendor/slim/slim/Slim/MiddlewareDispatcher.php(178): Slim\Csrf\Guard->process(Object(GuzzleHttp\Psr7\ServerRequest), Object(Slim\Routing\RouteRunner))
#16 /var/www/docker-aio/php/vendor/slim/twig-view/src/TwigMiddleware.php(117): Psr\Http\Server\RequestHandlerInterface@anonymous->handle(Object(GuzzleHttp\Psr7\ServerRequest))
#17 /var/www/docker-aio/php/vendor/slim/slim/Slim/MiddlewareDispatcher.php(129): Slim\Views\TwigMiddleware->process(Object(GuzzleHttp\Psr7\ServerRequest), Object(Psr\Http\Server\RequestHandlerInterface@anonymous))
#18 /var/www/docker-aio/php/src/Middleware/AuthMiddleware.php(53): Psr\Http\Server\RequestHandlerInterface@anonymous->handle(Object(GuzzleHttp\Psr7\ServerRequest))
#19 /var/www/docker-aio/php/vendor/slim/slim/Slim/MiddlewareDispatcher.php(283): AIO\Middleware\AuthMiddleware->__invoke(Object(GuzzleHttp\Psr7\ServerRequest), Object(Psr\Http\Server\RequestHandlerInterface@anonymous))
#20 /var/www/docker-aio/php/vendor/slim/slim/Slim/Middleware/ErrorMiddleware.php(77): Psr\Http\Server\RequestHandlerInterface@anonymous->handle(Object(GuzzleHttp\Psr7\ServerRequest))
#21 /var/www/docker-aio/php/vendor/slim/slim/Slim/MiddlewareDispatcher.php(129): Slim\Middleware\ErrorMiddleware->process(Object(GuzzleHttp\Psr7\ServerRequest), Object(Psr\Http\Server\RequestHandlerInterface@anonymous))
#22 /var/www/docker-aio/php/vendor/slim/slim/Slim/MiddlewareDispatcher.php(73): Psr\Http\Server\RequestHandlerInterface@anonymous->handle(Object(GuzzleHttp\Psr7\ServerRequest))
#23 /var/www/docker-aio/php/vendor/slim/slim/Slim/App.php(209): Slim\MiddlewareDispatcher->handle(Object(GuzzleHttp\Psr7\ServerRequest))
#24 /var/www/docker-aio/php/vendor/slim/slim/Slim/App.php(193): Slim\App->handle(Object(GuzzleHttp\Psr7\ServerRequest))
#25 /var/www/docker-aio/php/public/index.php(200): Slim\App->run()
#26 {main}
Tips: To display error details in HTTP response set "displayErrorDetails" to true in the ErrorHandler constructor.
Web Browser
N/A
Web server / Reverse Proxy
N/A
Configuration
<?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' => 'removed',
'port' => 6379,
),
'overwritehost' => 'nextcloud.removed.com',
'overwriteprotocol' => 'https',
'passwordsalt' => 'G/removed',
'secret' => 'removed',
'trusted_domains' =>
array (
0 => 'localhost',
1 => 'nextcloud.removed.com',
),
'datadirectory' => '/mnt/ncdata',
'dbtype' => 'pgsql',
'version' => '32.0.2.2',
'overwrite.cli.url' => 'https://nextcloud.removed.com/',
'dbname' => 'nextcloud_database',
'dbhost' => 'nextcloud-aio-database:5432',
'dbport' => '',
'dbtableprefix' => 'oc_',
'dbuser' => 'oc_nextcloud',
'dbpassword' => 'removed',
'installed' => true,
'instanceid' => 'removed',
'maintenance' => false,
'loglevel' => 2,
'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',
23 => 'OC\\Preview\\ImaginaryPDF',
),
'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',
'updatedirectory' => '/nc-updater',
'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' => false,
'trusted_proxies' =>
array (
0 => '127.0.0.1',
1 => '::1',
10 => '172.18.0.0/16',
),
'preview_imaginary_key' => 'removed',
'mail_from_address' => 'support',
'mail_sendmailmode' => 'smtp',
'mail_domain' => 'nextcloud.removed.com',
'mail_smtphost' => 'mail.removed.com',
'mail_smtpport' => '465',
'mail_smtpauth' => 1,
'mail_smtpname' => 'support@removed.com',
'mail_smtppassword' => 'removed',
'documentation_url.server_logs' => 'https://github.com/nextcloud/all-in-one/discussions/5425',
'data-fingerprint' => '167f01a8be825135d26616e48176c7fb',
'updatechecker' => false,
'preview_imaginary_url' => 'http://nextcloud-aio-imaginary:9000',
);