GTK warning when opening applications from terminal

[MatthijsBurgh]

Since the last update(52d59db) I get the following warning when opening applications from the terminal.

(python3:26471): Gtk-WARNING **: 10:57:28.889: Theme parsing error: gtk.css:7041:16: '-gtk-icon-size' is not a valid property name

I am running:
ubuntu 20.04
gtk 3.24.20
gnome 3.36.8

[MatthijsBurgh]

Thanks