Assistant chat breaks: An error occurred while creating the task

[meonkeys]

⚠️ Before posting ⚠️

• This is a bug, not a question or an enhancement.
• I've searched for similar issues and didn't find a duplicate.
• I've written a clear and descriptive title for this issue, not just "Bug" or "Crash".
• I agree to follow Nextcloud's Code of Conduct.

Steps to reproduce

1. touch "Assistant" in android app
2. right-scroll to "Chat" tab
3. hit "+" icon in lower right of screen to start a chat

Expected behaviour

begin chat with AI, similar to Assistant ➡ Chat with AI in nextcloud web ui

Actual behaviour

Error message: An error occurred while creating the task

Android version

/e/ OS 2.8

Device brand and model

Fairphone 4

Stock or custom OS?

Stock

Nextcloud android app version

3.31.0

Nextcloud server version

30.0.7

Using a reverse proxy?

Yes

Android logs

No response

Server error logs

Additional information

Assistant ➡ Chat with AI in nextcloud web ui works as expected

[SteveCaruso]

Error still there, same config but running latest NC30 version.

[IdefixRC]

Same issue here. Android version 3.31.1

[mvv588]

I have the same issue on the latest versions.

[lehboi]

Same issue here.
Android app 3.31.4
NC 31.0.6
I saw the below line in /var/log/apache2/access.log
2001:...:c0de - - [19/Jun/2025:10:11:46 +0700] "POST /ocs/v2.php/taskprocessing/schedule HTTP/2.0" 400 1088 "-" "Mozilla/5.0 (Android) Nextcloud-android/3.31.4"