Kernel: 5.16.11-1-default x86_64 
bits: 64 
Desktop: KDE Plasma 5.24.2
Distro: openSUSE Tumbleweed 20220310

(The following is largely copied from my Reddit post.)

Launching Gnote fails with the following desktop notification:

Launching Gnote Failed:
org.freedesktop.DBus.Error.ServiceUnknown

When launched via Terminal, Gnote successfully runs but coughs up the following
errors:

(140528158771840) ERROR: error_handler - XML error: Extra content at the end of
the document

(140528158771840) ERROR: error_handler - XML error: Extra content at the end of
the document

And closing (in terminal):

(gnote:16022): Gtk-CRITICAL **: 10:38:14.071:
gtk_tree_model_sort_set_sort_column_id: assertion 'header != NULL' failed

I'm able to reproduce this on both systems that have updated to the latest TW.
This has also been reproduced on the latest KDE Live ISO.