Support intro
Sorry to hear you’re facing problems 
help.nextcloud.com is for home/non-enterprise users. If you’re running a business, paid support can be accessed via portal.nextcloud.com where we can ensure your business keeps running smoothly.
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): 27.1.5
Operating system and version (eg, Ubuntu 20.04): Ubuntu Server 22.04
Apache or nginx version (eg, Apache 2.4.25): 2.4.58
PHP version (eg, 7.4): 7.4
The issue you are facing:
Opening a shared file or folder over a share link without an account results in an internal server error.
Is this the first time you’ve seen this error? (Y/N): Y
Steps to replicate it:
- Create a file or folder public share link in the files tab
- Open the link in a browser that is not logged into the nextcloud
The output of your Nextcloud log in Admin > Logging:
{"reqId":"IA2t7CnMybLLlORnaQU4","level":3,"time":"2024-02-29T10:07:38+00:00","remoteAddr":"172.19.0.1","user":"--","app":"index","method":"GET","url":"/s/rExiSB4CESHsWiF","message":"Exception thrown: Exception","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Falkon/23.08.5 QtWebEngine/5.15.2 Chrome/87.0.4280.144 Safari/537.36","version":"27.1.5.1","exception":{"Exception":"Exception","Message":"OCA\\Files_Reader\\Listeners\\LoadViewerListener::__construct(): Argument #3 ($userId) must be of type string, null given in file '/var/www/html/custom_apps/files_reader/lib/Listeners/LoadViewerListener.php' line 32","Code":0,"Trace":[{"file":"/var/www/html/lib/private/AppFramework/App.php","line":183,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[["OCA\\Files_Sharing\\Controller\\ShareController"],"showShare"]},{"file":"/var/www/html/lib/private/Route/Router.php","line":315,"function":"main","class":"OC\\AppFramework\\App","type":"::","args":["OCA\\Files_Sharing\\Controller\\ShareController","showShare",["OC\\AppFramework\\DependencyInjection\\DIContainer"],["rExiSB4CESHsWiF","files_sharing.Share.showShare"]]},{"file":"/var/www/html/lib/base.php","line":1068,"function":"match","class":"OC\\Route\\Router","type":"->","args":["/s/rExiSB4CESHsWiF"]},{"file":"/var/www/html/index.php","line":38,"function":"handleRequest","class":"OC","type":"::","args":[]}],"File":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","Line":169,"Previous":{"Exception":"TypeError","Message":"OCA\\Files_Reader\\Listeners\\LoadViewerListener::__construct(): Argument #3 ($userId) must be of type string, null given","Code":0,"Trace":[{"function":"__construct","class":"OCA\\Files_Reader\\Listeners\\LoadViewerListener","type":"->","args":[["OC\\AppFramework\\Services\\InitialState"],["OC\\AllConfig"],null]},{"file":"/var/www/html/lib/private/AppFramework/Utility/SimpleContainer.php","line":116,"function":"newInstanceArgs","class":"ReflectionClass","type":"->","args":[[["OC\\AppFramework\\Services\\InitialState"],["OC\\AllConfig"],null]]},{"file":"/var/www/html/lib/private/AppFramework/Utility/SimpleContainer.php","line":124,"function":"buildClass","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->","args":[["ReflectionClass","OCA\\Files_Reader\\Listeners\\LoadViewerListener"]]},{"file":"/var/www/html/lib/private/AppFramework/Utility/SimpleContainer.php","line":142,"function":"resolve","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->","args":["OCA\\Files_Reader\\Listeners\\LoadViewerListener"]},{"file":"/var/www/html/lib/private/AppFramework/DependencyInjection/DIContainer.php","line":494,"function":"query","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->","args":["OCA\\Files_Reader\\Listeners\\LoadViewerListener"]},{"file":"/var/www/html/lib/private/ServerContainer.php","line":155,"function":"queryNoFallback","class":"OC\\AppFramework\\DependencyInjection\\DIContainer","type":"->","args":["OCA\\Files_Reader\\Listeners\\LoadViewerListener"]},{"file":"/var/www/html/lib/private/EventDispatcher/ServiceEventListener.php","line":70,"function":"query","class":"OC\\ServerContainer","type":"->","args":["OCA\\Files_Reader\\Listeners\\LoadViewerListener"]},{"file":"/var/www/html/3rdparty/symfony/event-dispatcher/EventDispatcher.php","line":251,"function":"__invoke","class":"OC\\EventDispatcher\\ServiceEventListener","type":"->","args":[["OCA\\Viewer\\Event\\LoadViewer"],"OCA\\Viewer\\Event\\LoadViewer",["Symfony\\Component\\EventDispatcher\\EventDispatcher"]]},{"file":"/var/www/html/3rdparty/symfony/event-dispatcher/EventDispatcher.php","line":73,"function":"callListeners","class":"Symfony\\Component\\EventDispatcher\\EventDispatcher","type":"->","args":[[["Closure"],["Closure"],["Closure"],["Closure"],["Closure"],"And 2 more entries, set log level to debug to see all entries"],"OCA\\Viewer\\Event\\LoadViewer",["OCA\\Viewer\\Event\\LoadViewer"]]},{"file":"/var/www/html/lib/private/EventDispatcher/EventDispatcher.php","line":94,"function":"dispatch","class":"Symfony\\Component\\EventDispatcher\\EventDispatcher","type":"->","args":[["OCA\\Viewer\\Event\\LoadViewer"],"OCA\\Viewer\\Event\\LoadViewer"]},{"file":"/var/www/html/lib/private/EventDispatcher/EventDispatcher.php","line":106,"function":"dispatch","class":"OC\\EventDispatcher\\EventDispatcher","type":"->","args":["OCA\\Viewer\\Event\\LoadViewer",["OCA\\Viewer\\Event\\LoadViewer"]]},{"file":"/var/www/html/apps/files_sharing/lib/DefaultPublicShareTemplateProvider.php","line":238,"function":"dispatchTyped","class":"OC\\EventDispatcher\\EventDispatcher","type":"->","args":[["OCA\\Viewer\\Event\\LoadViewer"]]},{"file":"/var/www/html/apps/files_sharing/lib/Controller/ShareController.php","line":378,"function":"renderPage","class":"OCA\\Files_Sharing\\DefaultPublicShareTemplateProvider","type":"->","args":[["OC\\Share20\\Share"],"rExiSB4CESHsWiF",""]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":230,"function":"showShare","class":"OCA\\Files_Sharing\\Controller\\ShareController","type":"->","args":[""]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":137,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[["OCA\\Files_Sharing\\Controller\\ShareController"],"showShare"]},{"file":"/var/www/html/lib/private/AppFramework/App.php","line":183,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[["OCA\\Files_Sharing\\Controller\\ShareController"],"showShare"]},{"file":"/var/www/html/lib/private/Route/Router.php","line":315,"function":"main","class":"OC\\AppFramework\\App","type":"::","args":["OCA\\Files_Sharing\\Controller\\ShareController","showShare",["OC\\AppFramework\\DependencyInjection\\DIContainer"],["rExiSB4CESHsWiF","files_sharing.Share.showShare"]]},{"file":"/var/www/html/lib/base.php","line":1068,"function":"match","class":"OC\\Route\\Router","type":"->","args":["/s/rExiSB4CESHsWiF"]},{"file":"/var/www/html/index.php","line":38,"function":"handleRequest","class":"OC","type":"::","args":[]}],"File":"/var/www/html/custom_apps/files_reader/lib/Listeners/LoadViewerListener.php","Line":32},"CustomMessage":"Exception thrown: Exception"}}
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' =>
array (
),
'check_data_directory_permissions' => false,
'memcache.distributed' => '\\OC\\Memcache\\Redis',
'memcache.locking' => '\\OC\\Memcache\\Redis',
'redis' =>
array (
'host' => 'nextcloud-aio-redis',
'password' => '[####]',
'port' => 6379,
),
'overwritehost' => 'nextcloud.[####]',
'overwriteprotocol' => 'https',
'passwordsalt' => '[####]',
'secret' => '[####]',
'trusted_domains' =>
array (
0 => 'localhost',
1 => 'nextcloud.ourdns.zone',
),
'datadirectory' => '/mnt/ncdata',
'dbtype' => 'pgsql',
'version' => '27.1.5.1',
'overwrite.cli.url' => 'https://nextcloud.ourdns.zone/',
'dbname' => 'nextcloud_database',
'dbhost' => 'nextcloud-aio-database',
'dbport' => '',
'dbtableprefix' => 'oc_',
'dbuser' => 'oc_nextcloud',
'dbpassword' => '[####]',
'installed' => true,
'instanceid' => 'ocmhubwedgab',
'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',
),
'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',
'allow_local_remote_servers' => true,
'davstorage.request_timeout' => 3600,
'htaccess.RewriteBase' => '/',
'dbpersistent' => false,
'files_external_allow_create_new_local' => false,
'trusted_proxies' =>
array (
0 => '127.0.0.1',
1 => '::1',
),
'preview_imaginary_url' => 'http://nextcloud-aio-imaginary:9000',
'app_install_overwrite' =>
array (
0 => 'folderplayer',
1 => 'radio',
2 => 'files_reader',
3 => 'solitaire',
4 => 'files_external_ipfs',
5 => 'nextcloud-videoplayer',
),
'mail_sendmailmode' => 'smtp',
'mail_smtpauth' => 1,
'mail_from_address' => 'noreply',
'mail_domain' => '[####]',
'mail_smtphost' => '[####]',
'mail_smtpname' => '[####]',
'mail_smtppassword' => '[####]',
'mail_smtpport' => '465',
'mail_smtpsecure' => 'ssl',
);
The output of your Apache/nginx/system log in /var/log/____:
caddy | {"level":"error","ts":1709198011.457703,"logger":"http.log.error.log0","msg":"read tcp 172.90.0.100:37132->172.90.0.1:11000: read: connection reset by peer","request":{"remote_ip":"89.1.154.150","remote_port":"42992","proto":"HTTP/1.1","method":"GET","host":"nextcloud.#####","uri":"/apps/richdocuments/settings/fonts.json","headers":{"Date":["Thu, 29 Feb 2024 09:13:31"],"User-Agent":["COOLWSD HTTP Agent 23.05.9.1"]},"tls":{"resumed":false,"version":772,"cipher_suite":4865,"proto":"","server_name":"nextcloud.#####"}},"duration":0.000565662,"status":502,"err_id":"b4j6m8ba1","err_trace":"reverseproxy.statusError (reverseproxy.go:1299)"}
caddy | {"level":"error","ts":1709199244.4279833,"logger":"http.handlers.reverse_proxy","msg":"aborting with incomplete response","error":"http2: stream closed"}
caddy | {"level":"info","ts":1709199797.7403238,"logger":"tls","msg":"cleaning storage unit","description":"FileStorage:/data/caddy"}
caddy | {"level":"info","ts":1709199797.744463,"logger":"tls","msg":"finished cleaning storage units"}
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