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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).
Some or all of the below information will be requested if it isnât supplied; for fastest response please provide as much as you can. 
The Basics
- Nextcloud Server version (e.g., 29.x.x):
Nextcloud Hub 9(30.0.13)
- Operating system and version (e.g., Ubuntu 24.04):
Debian 6.12.57-1~bpo12+1 (2025-11-17) x86_64
- Is this the first time youâve seen this error? (Yes / No):
Yes
- When did this problem seem to first start?
Today
- 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:
When attempting to load the AIO interface on port 8080, I am shown a webpage that says only: âSlim Application Error // A website error has occurred. Sorry for the temporary inconvenience. // Go Backâ. There is no further detail.
The main Nextcloud website on port 80 loads and is fully functional. I havenât found any other errors. It has been a while since I have updated my containers, and I know that the master container has been out of date for ~ a couple of weeks. Since last accessing the AIO interface I have updated Debian packages, but have not touched the Nextcloud installation.
I have read Slim Application Error in AIO Interface and Slim Application Error when accessing AIO but their issues seem to be different, and they have more information presented to them. Not sure how to proceed to debug further so any help is appreciated!
Steps to replicate it (hint: details matter!):
-
Fail to update Nextcloud AIO containers, including master container
-
Wait for a couple of weeks to pass, and update other system packages.
-
Attempt to load Nextcloud AIO to update containers.
Log entries
Nextcloud
Please provide the log entries from your Nextcloud log that are generated during the time of problem (via the Copy raw option from Administration settings->Logging screen or from your nextcloud.log located in your data directory). Feel free to use a pastebin/gist service if necessary.
[no mention of "slim" anywhere within the log files, only:]
ConnectException cURL error 7: Failed to connect to nextcloud.edsilver.uk port 443 after 4 ms: Could not connect to server (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) for https://nextcloud.edsilver.uk/hosting/discovery
Web Browser
If the problem is related to the Web interface, open your browser inspector Console and Network tabs while refreshing (reloading) and reproducing the problem. Provide any relevant output/errors here that appear.
GET
https://192.168.0.37:8080/containers
[HTTP/1.1 500 Internal Server Error 80ms]
GET
https://192.168.0.37:8080/favicon.ico
[HTTP/1.1 404 Not Found 82ms]
Web server / Reverse Proxy
The output of your Apache/nginx/system log in /var/log/____:
not sure how to find this...
Configuration
Nextcloud
The output of occ config:list system or similar is best, but, if not possible, the contents of your config.php file from /path/to/nextcloud is fine (make sure to remove any identifiable information!):
{
"system": {
"memcache.local": "\\OC\\Memcache\\APCu",
"apps_paths": [
{
"path": "\/var\/www\/html\/apps",
"url": "\/apps",
"writable": false
},
{
"path": "\/var\/www\/html\/custom_apps",
"url": "\/custom_apps",
"writable": true
}
],
"memcache.distributed": "\\OC\\Memcache\\Redis",
"memcache.locking": "\\OC\\Memcache\\Redis",
"redis": {
"host": "***REMOVED SENSITIVE VALUE***",
"password": "***REMOVED SENSITIVE VALUE***",
"port": 6379
},
"overwritehost": "nextcloud.edsilver.uk",
"overwriteprotocol": "https",
"passwordsalt": "***REMOVED SENSITIVE VALUE***",
"secret": "***REMOVED SENSITIVE VALUE***",
"trusted_domains": [
"localhost",
"nextcloud.edsilver.uk"
],
"datadirectory": "***REMOVED SENSITIVE VALUE***",
"dbtype": "pgsql",
"version": "30.0.13.1",
"overwrite.cli.url": "https:\/\/nextcloud.edsilver.uk\/",
"dbname": "***REMOVED SENSITIVE VALUE***",
"dbhost": "***REMOVED SENSITIVE VALUE***",
"dbport": "",
"dbtableprefix": "oc_",
"dbuser": "***REMOVED SENSITIVE VALUE***",
"dbpassword": "***REMOVED SENSITIVE VALUE***",
"installed": true,
"instanceid": "***REMOVED SENSITIVE VALUE***",
"check_data_directory_permissions": false,
"maintenance": false,
"updater.release.channel": "stable",
"updatedirectory": "\/nc-updater",
"loglevel": "2",
"log_type": "file",
"logfile": "\/var\/www\/html\/data\/nextcloud.log",
"log_rotate_size": "10485760",
"log.condition": {
"apps": [
"admin_audit"
]
},
"preview_max_x": "2048",
"preview_max_y": "2048",
"jpeg_quality": "60",
"enabledPreviewProviders": {
"1": "OC\\Preview\\Image",
"2": "OC\\Preview\\MarkDown",
"3": "OC\\Preview\\MP3",
"4": "OC\\Preview\\TXT",
"5": "OC\\Preview\\OpenDocument",
"6": "OC\\Preview\\Movie",
"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": true,
"one-click-instance.user-limit": 100,
"one-click-instance.link": "https:\/\/nextcloud.com\/all-in-one\/",
"htaccess.RewriteBase": "\/",
"files_external_allow_create_new_local": false,
"trusted_proxies": "***REMOVED SENSITIVE VALUE***",
"allow_local_remote_servers": true,
"preview_imaginary_url": "***REMOVED SENSITIVE VALUE***",
"appsallowlist": false,
"upgrade.cli-upgrade-link": "https:\/\/github.com\/nextcloud\/all-in-one\/discussions\/2726",
"maintenance_window_start": 100,
"davstorage.request_timeout": 3600,
"dbpersistent": false,
"auth.bruteforce.protection.enabled": true,
"ratelimit.protection.enabled": true,
"preview_imaginary_key": "***REMOVED SENSITIVE VALUE***",
"mail_from_address": "***REMOVED SENSITIVE VALUE***",
"mail_sendmailmode": "smtp",
"mail_domain": "***REMOVED SENSITIVE VALUE***",
"mail_smtphost": "***REMOVED SENSITIVE VALUE***",
"mail_smtpport": "587",
"mail_smtpauth": 1,
"mail_smtpname": "***REMOVED SENSITIVE VALUE***",
"mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
"documentation_url.server_logs": "https:\/\/github.com\/nextcloud\/all-in-one\/discussions\/5425",
"updatechecker": false,
"DOMAIN": "nextcloud.edsilver.uk"
}
}
Apps
The output of occ app:list (if possible).
Enabled:
- activity: 3.0.0
- admin_audit: 1.20.0
- bruteforcesettings: 3.0.0
- calendar: 5.3.6
- camerarawpreviews: 0.8.7
- circles: 30.0.0
- cloud_federation_api: 1.13.0
- comments: 1.20.1
- contacts: 7.2.0
- contactsinteraction: 1.11.0
- dashboard: 7.10.0
- dav: 1.31.1
- deck: 1.14.5
- federatedfilesharing: 1.20.0
- federation: 1.20.0
- files: 2.2.0
- files_downloadlimit: 3.0.0
- files_pdfviewer: 3.0.0
- files_reminders: 1.3.0
- files_sharing: 1.22.0
- files_trashbin: 1.20.1
- files_versions: 1.23.0
- firstrunwizard: 3.0.0
- logreader: 3.0.0
- lookup_server_connector: 1.18.0
- nextcloud-aio: 0.8.0
- nextcloud_announcements: 2.0.0
- notifications: 3.0.0
- notify_push: 1.3.0
- oauth2: 1.18.1
- password_policy: 2.0.0
- photos: 3.0.2
- privacy: 2.0.0
- provisioning_api: 1.20.0
- recommendations: 3.0.0
- related_resources: 1.5.0
- richdocuments: 8.5.13
- serverinfo: 2.0.0
- settings: 1.13.0
- sharebymail: 1.20.0
- support: 2.0.0
- survey_client: 2.0.0
- systemtags: 1.20.0
- tasks: 0.16.1
- text: 4.1.0
- theming: 2.6.0
- twofactor_backupcodes: 1.19.0
- twofactor_totp: 12.0.0-dev
- updatenotification: 1.20.0
- user_status: 1.10.0
- viewer: 3.0.0
- weather_status: 1.10.0
- webhook_listeners: 1.1.0-dev
- whiteboard: 1.5.4
- workflowengine: 2.12.0
Disabled:
- app_api: 4.0.6 (installed 4.0.6)
- encryption: 2.18.0
- files_external: 1.22.0
- files_rightclick: 0.15.1 (installed 1.6.0)
- suspicious_login: 8.0.0
- twofactor_nextcloud_notification: 4.0.0
- user_ldap: 1.21.0
federatedfilesharing: 1.20.0
federation: 1.20.0
files: 2.2.0
files_downloadlimit: 3.0.0
files_pdfviewer: 3.0.0
files_reminders: 1.3.0
files_sharing: 1.22.0
files_trashbin: 1.20.1
files_versions: 1.23.0
firstrunwizard: 3.0.0
logreader: 3.0.0
lookup_server_connector: 1.18.0
nextcloud-aio: 0.8.0
nextcloud_announcements: 2.0.0
notifications: 3.0.0
notify_push: 1.3.0
oauth2: 1.18.1
password_policy: 2.0.0
photos: 3.0.2
privacy: 2.0.0
provisioning_api: 1.20.0
recommendations: 3.0.0
related_resources: 1.5.0
richdocuments: 8.5.13
serverinfo: 2.0.0
settings: 1.13.0
sharebymail: 1.20.0
support: 2.0.0
survey_client: 2.0.0
systemtags: 1.20.0
tasks: 0.16.1
text: 4.1.0
theming: 2.6.0
twofactor_backupcodes: 1.19.0
twofactor_totp: 12.0.0-dev
updatenotification: 1.20.0
user_status: 1.10.0
viewer: 3.0.0
weather_status: 1.10.0
webhook_listeners: 1.1.0-dev
whiteboard: 1.5.4
workflowengine: 2.12.0
Disabled:
app_api: 4.0.6 (installed 4.0.6)
encryption: 2.18.0
files_external: 1.22.0
files_rightclick: 0.15.1 (installed 1.6.0)
suspicious_login: 8.0.0
twofactor_nextcloud_notification: 4.0.0
user_ldap: 1.21.0
Tips for increasing the likelihood of a response
- Use the
preformatted textformatting option in the editor for all log entries and configuration output. - If screenshots are useful, feel free to include them.
- If possible, also include key error output in text form so it can be searched for.
- Try to edit log output only minimally (if at all) so that it can be ran through analyzers / formatters by those trying to help you.