Libreoffice Writer connect to remote files on Nextcloud

OS: Ubuntu 24.04 LTS or Debian 12
Version: 24.8.2.1 (X86_64) / LibreOffice Community
Build ID: 0f794b6e29741098670a3b95d60478a65d05ef13
CPU threads: 12; OS: Linux 6.8; UI render: default; VCL: gtk3
Locale: de-AT (en_US.UTF-8); UI: en-US
Flatpak
Calc: threaded
I get no error message and I am not prompted for a user & password.
My wild guess Flatpak is not providing enough information to my system.
I am connecting to my nextcloud account with webdav in nautilus without problems.

Tell us if this answer from debian-forum helps !!

I am not sure I understand his solution. It is more like a workaround. I wonder why nobody else having this problem. Right now I copy and paste from file browser to nextcloud instance and I thought it is saving me some time to do it from LO writer directly and it is less error prone.