Created attachment 8651 trace log Terminal output: (parole:11005): Gtk-CRITICAL **: 10:50:51.727: gtk_widget_get_toplevel: assertion 'GTK_IS_WIDGET (widget)' failed
No error here, are there any steps to reproduce or just open and close parole?
It looks like it only happens when the MPRIS2 plugin is enabled.
Sean Davis referenced this bugreport in commit 4d14e5a550519cb8456028c2b1691e3d6de151f9 Fix Gtk-CRITICAL when closing main window (bug #15621) https://git.xfce.org/apps/parole/commit?id=4d14e5a550519cb8456028c2b1691e3d6de151f9
Resolved with the above commit. Thanks for the report!