Describe the bug
I still get this error message when synchronizing certain archived Projects (task lists):
Entity: line 3: parser error : Extra content at the end of the document
For a moment I thought that this error went away when I unarchive a problematic Project (task list), and close and start Planify again.
But now, I now noticed (when writing this issue) that also an unarchived Projects (task lists) does not sychronize correctly.

What is weird is that sometimes a Project (task list) seems to synchronize correctly, but a later time not any more.

To Reproduce
Steps to reproduce the behavior:

1. Start Planify with Nextcloud as the back end
2. Wait for Planify to start synchronizing

Expected behavior
All tasks are synchronized without errors

Desktop (please complete the following information):

• OS or DE: Fedora 42, GNOME Wayland, fully up to date
• Version: Planify 4.15.1

Additional context
I had this error before. See issue #1807. This seems to be partially solved.

Here a snippet from the debug messages:

Entity: line 3: parser error : Extra content at the end of the document

^

** (io.github.alainm23.planify:2): WARNING **: 15:16:40.828: Core.vala:281: Failed to sync: . 

Please let me know if you need additional information, or if I can do some testing. I really like Planify!