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Getting help
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- Official documentation (searchable and regularly updated)
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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. 
The Basics
- Nextcloud Server version (e.g., 29.x.x):
28.0.12
- Operating system and version (e.g., Ubuntu 24.04):
Ubuntu 22.04.5 LTS
- Web server and version (e.g, Apache 2.4.25):
Apache 2.4.52
- Reverse proxy and version _(e.g. nginx 1.27.2)
n/a
- PHP version (e.g, 8.3):
8.1.2
- Is this the first time you’ve seen this error? (Yes / No):
Yes
- When did this problem seem to first start?
20 days ago per the system Administration Overview
- Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
Bare Metal
- Are you using CloudfIare, mod_security, or similar? (Yes / No)
No
Summary of the issue you are facing:
[I have noticed hundreds of errors in my logs, almost all related to the background tasks being unable to run. Crontab runs the cron.php job every 10 minutes.]
Steps to replicate it (hint: details matter!):
- Running the cron.php job manually results in a similar error as well.
Manual cron invocation command: sudo -u www-data php /var/www/nextcloud/cron.php
Log entries
Result of above manual invocation of cron.php
Error: Cannot call constructor in /var/www/nextcloud/apps/activity/lib/BackgroundJob/RemoteActivity.php:40
Stack trace:
#0 [internal function]: OCA\Activity\BackgroundJob\RemoteActivity->__construct()
#1 /var/www/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php(120): ReflectionClass->newInstanceArgs()
#2 /var/www/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php(128): OC\AppFramework\Utility\SimpleContainer->buildClass()
#3 /var/www/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php(146): OC\AppFramework\Utility\SimpleContainer->resolve()
#4 /var/www/nextcloud/lib/private/AppFramework/DependencyInjection/DIContainer.php(470): OC\AppFramework\Utility\SimpleContainer->query()
#5 /var/www/nextcloud/lib/private/ServerContainer.php(155): OC\AppFramework\DependencyInjection\DIContainer->queryNoFallback()
#6 /var/www/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php(64): OC\ServerContainer->query()
#7 /var/www/nextcloud/lib/public/Server.php(55): OC\AppFramework\Utility\SimpleContainer->get()
#8 /var/www/nextcloud/lib/private/BackgroundJob/JobList.php(325): OCP\Server::get()
#9 /var/www/nextcloud/lib/private/BackgroundJob/JobList.php(234): OC\BackgroundJob\JobList->buildJob()
#10 /var/www/nextcloud/cron.php(145): OC\BackgroundJob\JobList->getNext()
#11 {main}
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.
{"reqId":"0J9Hpd6ot5q7GnZx6m1H","level":3,"time":"2024-12-13T23:45:01+00:00","remoteAddr":"","user":"--","app":"cron","method":"","url":"--","message":"Exception thrown: Error","userAgent":"--","version":"28.0.12.2","exception":{"Exception":"Error","Message":"Cannot call constructor","Code":0,"Trace":[{"function":"__construct","class":"OCA\\Activity\\BackgroundJob\\RemoteActivity","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php","line":120,"function":"newInstanceArgs","class":"ReflectionClass","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php","line":128,"function":"buildClass","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php","line":146,"function":"resolve","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/DependencyInjection/DIContainer.php","line":470,"function":"query","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->"},{"file":"/var/www/nextcloud/lib/private/ServerContainer.php","line":155,"function":"queryNoFallback","class":"OC\\AppFramework\\DependencyInjection\\DIContainer","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php","line":64,"function":"query","class":"OC\\ServerContainer","type":"->"},{"file":"/var/www/nextcloud/lib/public/Server.php","line":55,"function":"get","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->"},{"file":"/var/www/nextcloud/lib/private/BackgroundJob/JobList.php","line":325,"function":"get","class":"OCP\\Server","type":"::"},{"file":"/var/www/nextcloud/lib/private/BackgroundJob/JobList.php","line":234,"function":"buildJob","class":"OC\\BackgroundJob\\JobList","type":"->"},{"file":"/var/www/nextcloud/cron.php","line":145,"function":"getNext","class":"OC\\BackgroundJob\\JobList","type":"->"}],"File":"/var/www/nextcloud/apps/activity/lib/BackgroundJob/RemoteActivity.php","Line":40,"CustomMessage":"Exception thrown: Error"},"id":"675cc8404a949"}
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": {
"supportedDatabases": [
"mysql",
"pgsql",
"oci"
],
"instanceid": "***REMOVED SENSITIVE VALUE***",
"passwordsalt": "***REMOVED SENSITIVE VALUE***",
"secret": "***REMOVED SENSITIVE VALUE***",
"trusted_proxies": "***REMOVED SENSITIVE VALUE***",
"trusted_domains": [
"10.100.1.10",
"10.100.1.11",
"10.90.1.30",
"cloud.***REMOVED SENSITIVE VALUE***.org"
],
"datadirectory": "***REMOVED SENSITIVE VALUE***",
"overwrite.cli.url": "https:\/\/cloud.***REMOVED SENSITIVE VALUE***.org",
"dbtype": "mysql",
"version": "28.0.12.2",
"ldapIgnoreNamingRules": false,
"ldapUserCleanupInterval": 51,
"lost_password_link": "disabled",
"dbname": "***REMOVED SENSITIVE VALUE***",
"dbhost": "***REMOVED SENSITIVE VALUE***",
"dbtableprefix": "oc_",
"dbuser": "***REMOVED SENSITIVE VALUE***",
"dbpassword": "***REMOVED SENSITIVE VALUE***",
"logtimezone": "UTC",
"logfile": "\/var\/log\/nextcloud\/nextcloud.log",
"installed": true,
"memcache.local": "\\OC\\Memcache\\APCu",
"memcache.distributed": "\\OC\\Memcache\\Redis",
"filelocking.enabled": "true",
"memcache.locking": "\\OC\\Memcache\\Redis",
"redis": {
"host": "***REMOVED SENSITIVE VALUE***",
"port": 6379,
"password": "***REMOVED SENSITIVE VALUE***",
"timeout": 0
},
"loglevel": 1,
"maintenance": false,
"trashbin_retention_obligation": "auto",
"versions_retention_obligation": "auto",
"theme": "",
"htaccess.RewriteBase": "\/",
"mail_smtpmode": "smtp",
"mail_from_address": "***REMOVED SENSITIVE VALUE***",
"mail_domain": "***REMOVED SENSITIVE VALUE***",
"mail_smtphost": "***REMOVED SENSITIVE VALUE***",
"mail_smtpport": "25",
"ldapProviderFactory": "\\OCA\\User_LDAP\\LDAPProviderFactory",
"updater.release.channel": "stable",
"knowledgebaseenabled": false,
"auth.bruteforce.protection.enabled": false,
"mysql.utf8mb4": true,
"log_rotate_size": 0,
"default_phone_region": "US",
"allow_local_remote_servers": true,
"profile.enabled": false,
"maintenance_window_start": 3
}
}
Apps
The output of occ app:list (if possible).
Enabled:
- activity: 2.20.0
- admin_audit: 1.18.0
- cloud_federation_api: 1.11.0
- comments: 1.18.0
- dav: 1.29.2
- deck: 1.12.6
- federatedfilesharing: 1.18.0
- federation: 1.18.0
- files: 2.0.0
- files_external: 1.20.0
- files_pdfviewer: 2.9.0
- files_reminders: 1.1.0
- files_sharing: 1.20.0
- files_trashbin: 1.18.0
- files_versions: 1.21.0
- firstrunwizard: 2.17.0
- groupfolders: 16.0.12
- impersonate: 1.15.0
- logreader: 2.13.0
- lookup_server_connector: 1.16.0
- notifications: 2.16.0
- oauth2: 1.16.4
- onlyoffice: 9.5.0
- photos: 2.4.0
- provisioning_api: 1.18.0
- quota_warning: 1.20.0
- related_resources: 1.3.0
- serverinfo: 1.18.0
- settings: 1.10.1
- sharelisting: 1.2.0
- systemtags: 1.18.0
- text: 3.9.2
- theming: 2.3.0
- twofactor_backupcodes: 1.17.0
- twofactor_totp: 10.0.0-beta.2
- updatenotification: 1.18.0
- user_ldap: 1.19.0
- user_saml: 6.4.1
- user_usage_report: 1.12.1
- viewer: 2.2.0
- workflowengine: 2.10.0
Disabled: - apporder: 0.15.0 (installed 0.15.0)
- bruteforcesettings: 2.8.0 (installed 1.6.0)
- circles: 28.0.0 (installed 22.3.1)
- contactsinteraction: 1.9.0 (installed 1.5.0)
- dashboard: 7.8.0 (installed 7.0.0)
- encryption: 2.16.0
- files_rightclick: 0.15.1 (installed 1.6.0)
- nextcloud_announcements: 1.17.0 (installed 1.1)
- password_policy: 1.18.0 (installed 1.2.2)
- privacy: 1.12.0 (installed 1.0.0)
- recommendations: 2.0.0 (installed 0.4.0)
- sharebymail: 1.18.0 (installed 1.8.0)
- support: 1.11.1 (installed 1.7.0)
- survey_client: 1.16.0 (installed 1.0.0)
- suspicious_login: 6.0.0
- user_status: 1.8.1 (installed 1.0.1)
- weather_status: 1.8.0 (installed 1.0.0)
Thank you for any assistance or clues to help me fix this issue.