Issue with the Tilix terminal

[FelixFourcolor]

When using the Ketsa icon theme, I cannot open the preferences menu of the Tilix terminal.

$ tilix --preferences
(tilix:10173): Gtk-WARNING **: 19:43:56.825: Could not load a pixbuf from icon theme.
This may indicate that pixbuf loaders or the mime database could not be found.
2024-01-27T19:43:56.825 [error] app.d:166:main Er is een onverwachte fout opgetreden
2024-01-27T19:43:56.825 [error] app.d:167:main Fout: XML parse error: Error domain 1 code 76 on line 8 column 10 of data: Opening and ending tag mismatch: svg line 1 and defs

I don't know whose fault it is, so I also opened an issue int the tilix repo: gnunn1/tilix#2205

Arch Linux
Tilix 1.9.6-2
Gnome
Same behavior on both Wayland and X