Unable to create files via iOS app

[pbuchholz123]

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Steps to reproduce

1. Open the app
2. Click the "+"
3. Try to create a new excel sheet (or word or whatever)

Expected behaviour

The document should open and i should be able to edit it.

Actual behaviour

As soon as i click "Create excel sheet" it says "invalid template provided, code: 400) in a red popup.

Logs

Logs from the iOS app (got a bit confused because everything is declared as "INFO").

2026-01-29 11:54:10 [INFO] Request started: PROPFIND https://nextcloud.xxx.de/remote.php/dav/files/B4B41DD9-37F0-44A4-90BB-5C0342DFC1A2/Unbenannt.
2026-01-29 11:54:10 [INFO] Request started: No request created yet.
ud.xxx.de/remote.php/dav/files/B4B41DD9-37F0-44A4-90BB-5C0342DFC1A2/Unbenannt., result: failure(Alamofire.AFError.responseValidationFailed(reason: Alamofire.AFError.ResponseValidationFailureReason.unacceptableStatusCode(code: 404)))
2026-01-29 11:54:10 [INFO] Network response request: https://nextcloud.xxx.de/remote.php/dav/files/B4B41DD9-37F0-44A4-90BB-5C0342DFC1A2/Share%20IT/xxx, result: success(2130 bytes)
2026-01-29 11:54:10 [INFO] Request started: No request created yet.
2026-01-29 11:54:10 [INFO] Network response request: https://nextcloud.xxx.de/ocs/v2.php/apps/richdocuments/api/v1/templates/new, result: failure(Alamofire.AFError.responseValidationFailed(reason: Alamofire.AFError.ResponseValidationFailureReason.unacceptableStatusCode(code: 400)))

I can´t find any other logs related to this.

Reasoning or why should it be changed/implemented?

I am able to create this kind of files via web browser. Everything is working fine. But on iOS we can´t get it work. We tried different devices with different accounts (admin and non-admin).

//edit while creating the issue
Creating a .md file worked as expected, so i assume it is some kind of problem with our collabora instance?

Environment data

iOS version:
iOS 26.2

Nextcloud iOS app version:
7.2.2

Server operating system:
Debian 13 Docker (Nextcloud AIO)

Web server:
Apache

Database:
PostgreSQL

PHP version:
Whatever the current instance is using.

Nextcloud version:
32.0.4