Cannot share task list from admin account with groups

[bege10]

Steps to reproduce

1. Add task list
2. click on share
3. select group

Expected behavior

The selected group is displayed below the list for further settings.

This is what happens in a normal user account and with single accounts also in the admin account.

Actual behaviour

The selected group is not displayed.

Tasks app version

0.17.1

CalDAV-clients used

Thunderbird

Browser

Firefox 150.0.3, Brave 1.90.122

Client operating system

Windows 11 25H2

Server operating system

No response

Web server

None

Database engine version

None

PHP engine version

None

Nextcloud version

32.0.9

Updated from an older installed version or fresh install

None

List of activated apps

See screenshots below

Nextcloud configuration

We don't host Nextcloud ourselves but use Hetzner Storageshare.

Web server error log

Log file

Browser log

Additional info