The Basics
- Nextcloud Server version (e.g., 29.x.x):
31.0.7
- Operating system and version (e.g., Ubuntu 24.04):
DSM 7.2.2-72806 Update 3
- Web server and version (e.g, Apache 2.4.25):
appache http server 2.4
- PHP version (e.g, 8.3):
8.2.28-0107
- Is this the first time you’ve seen this error? (Yes / No):
Yes
- Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
copied the package by hand
- Are you using CloudfIare, mod_security, or similar? (Yes / No)
No
Summary of the issue you are facing:
My Android Notes app can’t connect to my server
Steps to replicate it (hint: details matter!):
- In android app:
Choose account - Select account (the generic Nextcloud app works fine), then:
ok Allow
Log entries
App Version: 4.3.1
App Version Code: 40030190
App Flavor: fdroid
Files App Version Code: 30320090 (PROD)
---
OS Version: 4.9.337-perf+(eng.root.20250606.143826)
OS API Level: 33
Device: FP3
Manufacturer: Fairphone
Model (and Product): FP3 (lineage_FP3)
---
com.nextcloud.android.sso.exceptions.NextcloudHttpRequestFailedException: HTTP request failed with HTTP status-code: 500
at com.nextcloud.android.sso.api.AidlNetworkRequest.performNetworkRequestV2(AidlNetworkRequest.java:179)
at com.nextcloud.android.sso.api.NextcloudAPI.performNetworkRequestV2(NextcloudAPI.java:159)
at com.nextcloud.android.sso.api.NextcloudAPI.lambda$performRequestObservableV2$0(NextcloudAPI.java:97)
at com.nextcloud.android.sso.api.NextcloudAPI.$r8$lambda$af7W9mq2B0ZrhVJwZd-ibFp8T3Y(Unknown Source:0)
at com.nextcloud.android.sso.api.NextcloudAPI$$ExternalSyntheticLambda1.subscribe(D8$$SyntheticClass:0)
at io.reactivex.internal.operators.observable.ObservableFromPublisher.subscribeActual(ObservableFromPublisher.java:31)
at io.reactivex.Observable.subscribe(Observable.java:12284)
at io.reactivex.internal.operators.observable.ObservableSingleMaybe.subscribeActual(ObservableSingleMaybe.java:31)
at io.reactivex.Maybe.subscribe(Maybe.java:4290)
at io.reactivex.Maybe.blockingGet(Maybe.java:2320)
at io.reactivex.Observable.blockingSingle(Observable.java:5381)
at it.niedermann.owncloud.notes.persistence.CapabilitiesClient.getCapabilities(CapabilitiesClient.java:38)
at it.niedermann.owncloud.notes.importaccount.ImportAccountActivity.lambda$onActivityResult$5(ImportAccountActivity.java:102)
at it.niedermann.owncloud.notes.importaccount.ImportAccountActivity.$r8$lambda$wIJzzcgrzM9d6k7exwdLMn3GvgQ(Unknown Source:0)
at it.niedermann.owncloud.notes.importaccount.ImportAccountActivity$$ExternalSyntheticLambda4.run(D8$$SyntheticClass:0)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:463)
at java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1137)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at java.lang.Thread.run(Thread.java:1012)
Caused by: java.lang.IllegalStateException: {"ocs":{"meta":{"status":"failure","statuscode":996,"message":"Internal Server Error\n"},"data":[]}}
at com.nextcloud.android.sso.InputStreamBinder.processRequestV2(InputStreamBinder.java:440)
at com.nextcloud.android.sso.InputStreamBinder.performNextcloudRequestAndBodyStreamV2(InputStreamBinder.java:113)
at com.nextcloud.android.sso.InputStreamBinder.performNextcloudRequestV2(InputStreamBinder.java:96)
at com.nextcloud.android.sso.aidl.IInputStreamService$Stub.onTransact(IInputStreamService.java:108)
at android.os.Binder.execTransactInternal(Binder.java:1280)
at android.os.Binder.execTransact(Binder.java:1244)
Nextcloud
{"reqId":"LzOQR9zTLwauup0kYrhe","level":3,"time":"2025-07-17T13:14:21+00:00","remoteAddr":"192.168.1.3","user":"lziegler","app":"no app in context","method":"GET","url":"/ocs/v2.php/cloud/capabilities?format=json","message":"hash_hkdf(): Argument #2 ($key) cannot be empty in file '/volume1/web/nextcloud/lib/private/Security/Crypto.php' line 147","userAgent":"Mozilla/5.0 (Android) Nextcloud-android/3.32.0","version":"31.0.7.1","exception":{"Exception":"Exception","Message":"hash_hkdf(): Argument #2 ($key) cannot be empty in file '/volume1/web/nextcloud/lib/private/Security/Crypto.php' line 147","Code":0,"Trace":[{"file":"/volume1/web/nextcloud/lib/private/AppFramework/App.php","line":161,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OC\\Core\\Controller\\WhatsNewController"},"getCapabilities"]},{"file":"/volume1/web/nextcloud/lib/private/Route/Router.php","line":315,"function":"main","class":"OC\\AppFramework\\App","type":"::","args":["OC\\Core\\Controller\\WhatsNewController","getCapabilities",{"__class__":"OC\\AppFramework\\DependencyInjection\\DIContainer"},{"_route":"ocs.core.whatsnew.getcapabilities"}]},{"file":"/volume1/web/nextcloud/ocs/v1.php","line":49,"function":"match","class":"OC\\Route\\Router","type":"->","args":["/ocsapp/cloud/capabilities"]},{"file":"/volume1/web/nextcloud/ocs/v2.php","line":7,"args":["/volume1/web/nextcloud/ocs/v1.php"],"function":"require_once"}],"File":"/volume1/web/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","Line":146,"Previous":{"Exception":"ValueError","Message":"hash_hkdf(): Argument #2 ($key) cannot be empty","Code":0,"Trace":[{"file":"/volume1/web/nextcloud/lib/private/Security/Crypto.php","line":147,"function":"hash_hkdf","args":["sha512",{"__class__":"SensitiveParameterValue"}]},{"file":"/volume1/web/nextcloud/lib/private/Security/Crypto.php","line":102,"function":"decryptWithoutSecret","class":"OC\\Security\\Crypto","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/volume1/web/nextcloud/lib/private/Security/IdentityProof/Manager.php","line":100,"function":"decrypt","class":"OC\\Security\\Crypto","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/volume1/web/nextcloud/lib/private/Security/IdentityProof/Manager.php","line":144,"function":"retrieveKey","class":"OC\\Security\\IdentityProof\\Manager","type":"->","args":["app-core-ocm_external"]},{"file":"/volume1/web/nextcloud/lib/private/OCM/OCMSignatoryManager.php","line":103,"function":"getAppKey","class":"OC\\Security\\IdentityProof\\Manager","type":"->","args":["core","ocm_external"]},{"file":"/volume1/web/nextcloud/apps/cloud_federation_api/lib/Capabilities.php","line":81,"function":"getLocalSignatory","class":"OC\\OCM\\OCMSignatoryManager","type":"->","args":[]},{"file":"/volume1/web/nextcloud/lib/private/CapabilitiesManager.php","line":61,"function":"getCapabilities","class":"OCA\\CloudFederationAPI\\Capabilities","type":"->","args":[]},{"file":"/volume1/web/nextcloud/core/Controller/OCSController.php","line":70,"function":"getCapabilities","class":"OC\\CapabilitiesManager","type":"->","args":[]},{"file":"/volume1/web/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":200,"function":"getCapabilities","class":"OC\\Core\\Controller\\OCSController","type":"->","args":[]},{"file":"/volume1/web/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":114,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OC\\Core\\Controller\\WhatsNewController"},"getCapabilities"]},{"file":"/volume1/web/nextcloud/lib/private/AppFramework/App.php","line":161,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OC\\Core\\Controller\\WhatsNewController"},"getCapabilities"]},{"file":"/volume1/web/nextcloud/lib/private/Route/Router.php","line":315,"function":"main","class":"OC\\AppFramework\\App","type":"::","args":["OC\\Core\\Controller\\WhatsNewController","getCapabilities",{"__class__":"OC\\AppFramework\\DependencyInjection\\DIContainer"},{"_route":"ocs.core.whatsnew.getcapabilities"}]},{"file":"/volume1/web/nextcloud/ocs/v1.php","line":49,"function":"match","class":"OC\\Route\\Router","type":"->","args":["/ocsapp/cloud/capabilities"]},{"file":"/volume1/web/nextcloud/ocs/v2.php","line":7,"args":["/volume1/web/nextcloud/ocs/v1.php"],"function":"require_once"}],"File":"/volume1/web/nextcloud/lib/private/Security/Crypto.php","Line":147},"message":"hash_hkdf(): Argument #2 ($key) cannot be empty in file '/volume1/web/nextcloud/lib/private/Security/Crypto.php' line 147","exception":[],"CustomMessage":"hash_hkdf(): Argument #2 ($key) cannot be empty in file '/volume1/web/nextcloud/lib/private/Security/Crypto.php' line 147"},"id":"6878f7358c16c"}
Configuration
Nextcloud
{
"system": {
"instanceid": "***REMOVED SENSITIVE VALUE***",
"passwordsalt": "***REMOVED SENSITIVE VALUE***",
"trusted_domains": [
"192.168.0.*",
"maylo.familyds.org",
"nextcloud.maylo.org"
],
"datadirectory": "***REMOVED SENSITIVE VALUE***",
"dbtype": "mysql",
"version": "31.0.7.1",
"overwrite.cli.url": "https:\/\/192.168.0.15\/nextcloud",
"dbname": "***REMOVED SENSITIVE VALUE***",
"dbhost": "***REMOVED SENSITIVE VALUE***",
"dbport": "",
"dbtableprefix": "oc_",
"memcache.local": "\\OC\\Memcache\\APCu",
"filelocking.enabled": false,
"mysql.utf8mb4": true,
"dbuser": "***REMOVED SENSITIVE VALUE***",
"dbpassword": "***REMOVED SENSITIVE VALUE***",
"installed": true,
"maintenance": false,
"theme": "",
"loglevel": 0,
"default_phone_region": "CH",
"mail_from_address": "***REMOVED SENSITIVE VALUE***",
"mail_smtpmode": "smtp",
"mail_sendmailmode": "smtp",
"mail_domain": "***REMOVED SENSITIVE VALUE***",
"mail_smtphost": "***REMOVED SENSITIVE VALUE***",
"mail_smtpport": "465",
"mail_smtpauthtype": "LOGIN",
"mail_smtpauth": 1,
"mail_smtpname": "***REMOVED SENSITIVE VALUE***",
"mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
"mail_smtpsecure": "ssl",
"maintenance_window_start": 100,
"secret": "***REMOVED SENSITIVE VALUE***",
"app_install_overwrite": []
}
}
Apps
Enabled:
- activity: 4.0.0
- app_api: 5.0.2
- calendar: 5.3.6
- circles: 31.0.0
- cloud_federation_api: 1.14.0
- comments: 1.21.0
- contacts: 7.2.0
- contactsinteraction: 1.12.0
- cookbook: 0.11.3
- dashboard: 7.11.0
- dav: 1.33.0
- federatedfilesharing: 1.21.0
- federation: 1.21.0
- files: 2.3.1
- files_downloadlimit: 4.0.0
- files_pdfviewer: 4.0.0
- files_reminders: 1.4.0
- files_sharing: 1.23.1
- files_trashbin: 1.21.0
- files_versions: 1.24.0
- firstrunwizard: 4.0.0
- logreader: 4.0.0
- lookup_server_connector: 1.19.0
- nextcloud_announcements: 3.0.0
- notes: 4.12.2
- notifications: 4.0.0
- oauth2: 1.19.1
- password_policy: 3.0.0
- photos: 4.0.0
- privacy: 3.0.0
- profile: 1.0.0
- provisioning_api: 1.21.0
- recommendations: 4.0.0
- related_resources: 2.0.0
- serverinfo: 3.0.0
- settings: 1.14.0
- sharebymail: 1.21.0
- support: 3.0.0
- survey_client: 3.0.0
- systemtags: 1.21.1
- tasks: 0.16.1
- text: 5.0.0
- theming: 2.6.1
- twofactor_backupcodes: 1.20.0
- updatenotification: 1.21.0
- user_status: 1.11.0
- viewer: 4.0.0
- weather_status: 1.11.0
- webhook_listeners: 1.2.0
- workflowengine: 2.13.0
Disabled:
- admin_audit: 1.21.0
- bruteforcesettings: 4.0.0 (installed 2.4.0)
- encryption: 2.19.0
- files_external: 1.23.0
- suspicious_login: 9.0.1
- twofactor_nextcloud_notification: 5.0.0
- twofactor_totp: 13.0.0-dev.0
- user_ldap: 1.22.0