Unable to add more than one contact in fresh install

Describe the bug

First contact create after page load works; every subsequent create in the same session
fails with "Contact not found". A hard page reload does NOT restore the ability
(contrary to typical stale-UI-state bugs).

Steps to reproduce

1. Fresh Nextcloud install (Docker, nextcloud:latest, server 34.0.3.2, MariaDB 11.8.9)
2. Open Contacts app; delete the single default welcome contact
3. Click "+ New contact", fill in name/email, save → works (contact persists in oc_cards)
4. Immediately click "+ New contact" again → error: "Contact not found"
5. All subsequent create attempts fail identically

Expected behavior

Each "+ New contact" click should create a new editable contact.

Actual behavior

First create after page load works; every subsequent create in the same session
fails with "Contact not found". A hard page reload does NOT restore the ability
(contrary to typical stale-UI-state bugs).

Contact version

8.8.0 (latest available; occ app:update contacts reported "up-to-date" at the time of testing)

Operating system

Linux ubuntuserver 7.0.0-31-generic #31-Ubuntu SMP PREEMPT_DYNAMIC Sat Aug 1 04:26:38 UTC 2026 x86_64 GNU/Linux, Server version: 34.0.3 (Nextcloud 34, docker image nextcloud:latest)

PHP engine version

None

Web server

None

Database

MariaDB

Additional info

• Server version: 34.0.3 (Nextcloud 34, docker image nextcloud:latest)
• Contacts app version: 8.8.0 (latest available; occ app:update contacts
  reported "up-to-date" at the time of testing)
• Database: MariaDB 11.8.9
• Browser: Chrome and Firefox, private/incognito windows — fails identically
• Hard refresh (Ctrl+Shift+R): does not help
• One address book originally; error reproduces in a second, newly created
  address book too

Evidence that the write path itself works

• Editing an existing contact via the GUI works and changes persist to
  oc_cards.carddata (verified via SQL)
• Creating a new address book via the GUI works (persisted in oc_addressbooks)
• Importing a multi-contact .vcf file WORKS — all imported contacts appear
  and persist, including a second and third contact (i.e. only the
  single-card create flow is broken)
• Error message "Contact not found" appears with no visible error in
  nextcloud.log
• Browser DevTools Network tab shows NO HTTP request is made at all when the
  failing "+ New contact" click occurs — the failure appears to be purely
  client-side (JS error in the frontend; console entries captured with

Console error at failure (captured with "Preserve log" enabled)

[ERROR] contacts: Something wrong happened while picking a file
Object { app: "contacts", uid: "", level: 2 }

Error: FilePicker: No nodes selected
fileName: http://192.168.1.119:8080/custom_apps/contacts/js/style-BlAQ7A1q.chunk.mjs
lineNumber: 3, columnNumber: 120501
stack:
Qg@http://192.168.1.119:8080/custom_apps/contacts/js/style-BlAQ7A1q.chunk.mjs:3:120501
pickNodes@http://192.168.1.119:8080/custom_apps/contacts/js/style-BlAQ7A1q.chunk.mjs:3:121414

Impact

Manual contact creation is impossible; importing a pre-built .vcf is a
functional workaround.

Reproduced 100% of attempts on a brand-new install with only default apps
(Calendar, Contacts, Mail, Nextcloud Office, Notes) installed.

Reproduce the second-contact failure in the Contacts app and inspect the browser console and Network tab, focusing on the reported style-BlAQ7A1q.chunk.mjs FilePicker error. Trace the client-side failure from the "+ New contact" action; done means repeated clicks create editable contacts and generate the expected requests without "Contact not found".