[Bug]: Call to a member function jsonSerialize() on null #51713
Description
⚠️ This issue respects the following points: ⚠️
- This is a bug, not a question or a configuration/webserver/proxy issue.
- This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
- Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
- I agree to follow Nextcloud's Code of Conduct.
Bug description
I get a null error in the cloud_federation_api app after upgrading to v31. I have no interest in the federation app and tried disabling both the cloud_federation_api and the federation app via the occ command, but that is not allowed.
The web UI is inaccessible due to this error:
Steps to reproduce
- Upgrade to v31
- Go to web UI
Expected behavior
No error
Nextcloud Server version
31
Operating system
Debian/Ubuntu
PHP engine version
PHP 8.3
Web server
Nginx
Database engine version
MariaDB
Is this bug present after an update or on a fresh install?
Upgraded to a MAJOR version (ex. 31 to 32)
Are you using the Nextcloud Server Encryption module?
None
What user-backends are you using?
- Default user-backend (database)
- LDAP/ Active Directory
- SSO - SAML
- Other
Configuration report
{
"system": {
"forcessl": true,
"overwriteprotocol": " https",
"memcache.local": "\\OC\\Memcache\\APCu",
"datadirectory": "***REMOVED SENSITIVE VALUE***",
"trusted_proxies": "***REMOVED SENSITIVE VALUE***",
"overwritewebroot": "\/nextcloud",
"overwrite.cli.url": "https:\/\/raddoc.net\/nextcloud",
"trusted_domains": [
"raddoc.net"
],
"instanceid": "***REMOVED SENSITIVE VALUE***",
"passwordsalt": "***REMOVED SENSITIVE VALUE***",
"secret": "***REMOVED SENSITIVE VALUE***",
"dbtype": "mysql",
"version": "31.0.2.1",
"dbname": "***REMOVED SENSITIVE VALUE***",
"dbhost": "***REMOVED SENSITIVE VALUE***",
"dbport": "",
"dbtableprefix": "oc_",
"dbuser": "***REMOVED SENSITIVE VALUE***",
"dbpassword": "***REMOVED SENSITIVE VALUE***",
"enable_previews": true,
"enabledPreviewProviders": {
"0": "OC\\Preview\\TXT",
"3": "OC\\Preview\\PDF",
"6": "OC\\Preview\\Image",
"7": "OC\\Preview\\Photoshop",
"8": "OC\\Preview\\TIFF",
"9": "OC\\Preview\\SVG",
"10": "OC\\Preview\\Font",
"12": "OC\\Preview\\Movie",
"13": "OC\\Preview\\MKV",
"14": "OC\\Preview\\MP4",
"15": "OC\\Preview\\AVI"
},
"installed": true,
"log_type": "file",
"logfile": "\/var\/log\/nextcloud.log",
"logfilemode": 416,
"loglevel": "0",
"logdateformat": "F d, Y H:i:s",
"updater.secret": "***REMOVED SENSITIVE VALUE***",
"maintenance": false,
"music.lastfm_api_key": "c29a7c80783f9b8c478eecd3ef45436e",
"filelocking.enabled": true,
"memcache.locking": "\\OC\\Memcache\\APCu",
"upgrade.disable-web": true
}
}List of activated Apps
Enabled:
- activity: 4.0.0
- app_api: 5.0.2
- bruteforcesettings: 4.0.0
- circles: 31.0.0
- cloud_federation_api: 1.14.0
- comments: 1.21.0
- dashboard: 7.11.0
- dav: 1.33.0
- federatedfilesharing: 1.21.0
- federation: 1.21.0
- files: 2.3.1
- files_automatedtagging: 2.0.0
- files_downloadlimit: 4.0.0
- files_external: 1.23.0
- files_reminders: 1.4.0
- files_sharing: 1.23.1
- files_trashbin: 1.21.0
- files_versions: 1.24.0
- groupfolders: 19.0.4
- logreader: 4.0.0
- lookup_server_connector: 1.19.0
- music: 2.1.2
- notifications: 4.0.0
- oauth2: 1.19.1
- photos: 4.0.0-dev.1
- previewgenerator: 5.8.0
- profile: 1.0.0
- provisioning_api: 1.21.0
- related_resources: 2.0.0
- settings: 1.14.0
- spreed: 21.0.1
- systemtags: 1.21.1
- text: 5.0.0
- theming: 2.6.1
- twofactor_backupcodes: 1.20.0
- user_status: 1.11.0
- viewer: 4.0.0
- weather_status: 1.11.0
- webhook_listeners: 1.2.0
- workflow_script: 2.0.0
- workflowengine: 2.13.0
Disabled:
- admin_audit: 1.21.0
- contactsinteraction: 1.12.0 (installed 1.0.0)
- encryption: 2.19.0
- files_pdfviewer: 4.0.0 (installed 1.8.0)
- files_rightclick: 1.6.0 (installed 1.6.0)
- firstrunwizard: 4.0.0 (installed 2.8.0)
- flow_notifications: 1.2.0 (installed 1.2.0)
- nextcloud_announcements: 3.0.0 (installed 1.8.0)
- password_policy: 3.0.0 (installed 1.9.1)
- privacy: 3.0.0 (installed 1.3.0)
- recommendations: 4.0.0 (installed 0.7.0)
- serverinfo: 3.0.0 (installed 1.9.0)
- sharebymail: 1.21.0 (installed 1.9.0)
- support: 3.0.0 (installed 1.2.1)
- survey_client: 3.0.0 (installed 1.7.0)
- suspicious_login: 9.0.1
- twofactor_nextcloud_notification: 5.0.0
- twofactor_totp: 13.0.0-dev.0
- updatenotification: 1.21.0 (installed 1.9.0)
- user_ldap: 1.22.0Nextcloud Signing status
Cannot due to errorNextcloud Logs
{"reqId":"sYS62gHkEAFViTrCISgP","level":0,"time":"March 25, 2025 23:41:19","remoteAddr":"192.168.0.1","user":false,"app":"bruteForce","method":"GET","url":"/nextcloud/index.php","message":"The loading of lazy AppConfig values have been triggered by app \"bruteForce\"","userAgent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36","version":"31.0.2.1","exception":{"Exception":"RuntimeException","Message":"The loading of lazy AppConfig values have been triggered by app \"bruteForce\"","Code":0,"Trace":[{"file":"/app/www/public/lib/private/AppConfig.php","line":1193,"function":"loadConfig","class":"OC\\AppConfig","type":"->"},{"file":"/app/www/public/lib/private/AppConfig.php","line":106,"function":"loadConfigAll","class":"OC\\AppConfig","type":"->"},{"file":"/app/www/public/lib/private/Security/Ip/BruteforceAllowList.php","line":39,"function":"getKeys","class":"OC\\AppConfig","type":"->"},{"file":"/app/www/public/lib/private/Security/Bruteforce/Throttler.php","line":86,"function":"isBypassListed","class":"OC\\Security\\Ip\\BruteforceAllowList","type":"->"},{"file":"/app/www/public/lib/private/Security/Bruteforce/Throttler.php","line":112,"function":"isBypassListed","class":"OC\\Security\\Bruteforce\\Throttler","type":"->"},{"file":"/app/www/public/lib/private/Security/Bruteforce/Throttler.php","line":129,"function":"getAttempts","class":"OC\\Security\\Bruteforce\\Throttler","type":"->"},{"file":"/app/www/public/core/Controller/LoginController.php","line":153,"function":"getDelay","class":"OC\\Security\\Bruteforce\\Throttler","type":"->"},{"file":"/app/www/public/lib/private/AppFramework/Http/Dispatcher.php","line":200,"function":"showLoginForm","class":"OC\\Core\\Controller\\LoginController","type":"->"},{"file":"/app/www/public/lib/private/AppFramework/Http/Dispatcher.php","line":114,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/app/www/public/lib/private/AppFramework/App.php","line":161,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/app/www/public/lib/private/Route/Router.php","line":307,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/app/www/public/lib/base.php","line":1025,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/app/www/public/index.php","line":24,"function":"handleRequest","class":"OC","type":"::"}],"File":"/app/www/public/lib/private/AppConfig.php","Line":1208,"message":"The loading of lazy AppConfig values have been triggered by app \"bruteForce\"","exception":{},"CustomMessage":"The loading of lazy AppConfig values have been triggered by app \"bruteForce\""}}
{"reqId":"sYS62gHkEAFViTrCISgP","level":2,"time":"March 25, 2025 23:41:19","remoteAddr":"192.168.0.1","user":false,"app":"cloud_federation_api","method":"GET","url":"/nextcloud/index.php","message":"cannot generate local signatory","userAgent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36","version":"31.0.2.1","exception":{"Exception":"NCU\\Security\\Signature\\Exceptions\\IdentityNotFoundException","Message":"cannot extract identity from https://raddoc.net/nextcloud/ocm/shares","Code":0,"Trace":[{"file":"/app/www/public/lib/private/Security/Signature/SignatureManager.php","line":284,"function":"extractIdentityFromUri","class":"NCU\\Security\\Signature\\Model\\Signatory","type":"::"},{"file":"/app/www/public/lib/private/OCM/OCMSignatoryManager.php","line":127,"function":"extractIdentityFromUri","class":"OC\\Security\\Signature\\SignatureManager","type":"->"},{"file":"/app/www/public/lib/private/OCM/OCMSignatoryManager.php","line":93,"function":"generateKeyId","class":"OC\\OCM\\OCMSignatoryManager","type":"->"},{"file":"/config/www/nextcloud/apps/cloud_federation_api/lib/Capabilities.php","line":82,"function":"getLocalSignatory","class":"OC\\OCM\\OCMSignatoryManager","type":"->"},{"file":"/app/www/public/lib/private/CapabilitiesManager.php","line":61,"function":"getCapabilities","class":"OCA\\CloudFederationAPI\\Capabilities","type":"->"},{"file":"/app/www/public/lib/private/Template/JSConfigHelper.php","line":137,"function":"getCapabilities","class":"OC\\CapabilitiesManager","type":"->"},{"file":"/app/www/public/lib/private/TemplateLayout.php","line":239,"function":"getConfig","class":"OC\\Template\\JSConfigHelper","type":"->"},{"file":"/app/www/public/lib/private/legacy/OC_Template.php","line":120,"function":"__construct","class":"OC\\TemplateLayout","type":"->"},{"file":"/app/www/public/lib/public/AppFramework/Http/TemplateResponse.php","line":189,"function":"fetchPage","class":"OC_Template","type":"->"},{"file":"/app/www/public/lib/private/AppFramework/Http/Dispatcher.php","line":159,"function":"render","class":"OCP\\AppFramework\\Http\\TemplateResponse","type":"->"},{"file":"/app/www/public/lib/private/AppFramework/App.php","line":161,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/app/www/public/lib/private/Route/Router.php","line":307,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/app/www/public/lib/base.php","line":1025,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/app/www/public/index.php","line":24,"function":"handleRequest","class":"OC","type":"::"}],"File":"/app/www/public/lib/unstable/Security/Signature/Model/Signatory.php","Line":190,"message":"cannot generate local signatory","exception":{},"CustomMessage":"cannot generate local signatory"}}
{"reqId":"sYS62gHkEAFViTrCISgP","level":3,"time":"March 25, 2025 23:41:19","remoteAddr":"192.168.0.1","user":false,"app":"index","method":"GET","url":"/nextcloud/index.php","message":"Call to a member function jsonSerialize() on null","userAgent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36","version":"31.0.2.1","exception":{"Exception":"Error","Message":"Call to a member function jsonSerialize() on null","Code":0,"Trace":[{"file":"/config/www/nextcloud/apps/cloud_federation_api/lib/Capabilities.php","line":90,"function":"jsonSerialize","class":"OC\\OCM\\Model\\OCMProvider","type":"->"},{"file":"/app/www/public/lib/private/CapabilitiesManager.php","line":61,"function":"getCapabilities","class":"OCA\\CloudFederationAPI\\Capabilities","type":"->"},{"file":"/app/www/public/lib/private/Template/JSConfigHelper.php","line":137,"function":"getCapabilities","class":"OC\\CapabilitiesManager","type":"->"},{"file":"/app/www/public/lib/private/TemplateLayout.php","line":239,"function":"getConfig","class":"OC\\Template\\JSConfigHelper","type":"->"},{"file":"/app/www/public/lib/private/legacy/OC_Template.php","line":120,"function":"__construct","class":"OC\\TemplateLayout","type":"->"},{"file":"/app/www/public/lib/public/AppFramework/Http/TemplateResponse.php","line":189,"function":"fetchPage","class":"OC_Template","type":"->"},{"file":"/app/www/public/lib/private/AppFramework/Http/Dispatcher.php","line":159,"function":"render","class":"OCP\\AppFramework\\Http\\TemplateResponse","type":"->"},{"file":"/app/www/public/lib/private/AppFramework/App.php","line":161,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/app/www/public/lib/private/Route/Router.php","line":307,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/app/www/public/lib/base.php","line":1025,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/app/www/public/index.php","line":24,"function":"handleRequest","class":"OC","type":"::"}],"File":"/app/www/public/lib/private/OCM/Model/OCMProvider.php","Line":239,"message":"Call to a member function jsonSerialize() on null","exception":{},"CustomMessage":"Call to a member function jsonSerialize() on null"}}Additional info
The error can be worked around by hacking the Capabilities.php and returning an empty array at once in getCapabilities