When I start gnome-software from terminal i get the below. The application runs fine though.
03:55:59:597 Gtk Theme parser error: gtk.css:3977:3-22: No property named “-gtk-outline-radius”
03:55:59:598 Gtk Theme parser error: gtk.css:4094:3-29: No property named “-GtkWidget-window-dragging”
03:55:59:598 Gtk Theme parser error: gtk.css:4108:9-37: No property named “-gtk-outline-top-left-radius”
03:55:59:598 Gtk Theme parser error: gtk.css:4110:9-38: No property named “-gtk-outline-top-right-radius”
03:55:59:598 Gtk Theme parser error: gtk.css:4113:9-40: No property named “-gtk-outline-bottom-left-radius”
03:55:59:598 Gtk Theme parser error: gtk.css:4115:9-41: No property named “-gtk-outline-bottom-right-radius”
03:55:59:599 Gtk Theme parser error: gtk.css:4118:5-33: No property named “-gtk-outline-top-left-radius”
03:55:59:599 Gtk Theme parser error: gtk.css:4120:5-34: No property named “-gtk-outline-top-right-radius”
03:55:59:599 Gtk Theme parser error: gtk.css:4123:5-36: No property named “-gtk-outline-bottom-left-radius”
03:55:59:599 Gtk Theme parser error: gtk.css:4125:5-37: No property named “-gtk-outline-bottom-right-radius”
03:55:59:599 Gtk Theme parser error: gtk.css:4131:7-36: No property named “-gtk-outline-top-right-radius”
03:55:59:599 Gtk Theme parser error: gtk.css:4133:7-39: No property named “-gtk-outline-bottom-right-radius”
03:55:59:599 Gtk Theme parser error: gtk.css:4136:7-35: No property named “-gtk-outline-top-left-radius”
03:55:59:599 Gtk Theme parser error: gtk.css:4138:7-38: No property named “-gtk-outline-bottom-left-radius”
03:55:59:600 Gtk Theme parser error: gtk.css:4212:23-37: Not a valid image
03:55:59:600 Gtk Theme parser error: gtk.css:4251:3-31: No property named “-gtk-outline-top-left-radius”
03:55:59:600 Gtk Theme parser error: gtk.css:4253:3-32: No property named “-gtk-outline-top-right-radius”
03:55:59:600 Gtk Theme parser error: gtk.css:4260:3-34: No property named “-gtk-outline-bottom-left-radius”
03:55:59:600 Gtk Theme parser error: gtk.css:4262:3-35: No property named “-gtk-outline-bottom-right-radius”
03:55:59:602 Gtk Theme parser error: gtk.css:4930:12-17: “shade” is not a valid color name.
03:55:59:602 Gtk Theme parser error: gtk.css:4990:12-17: “shade” is not a valid color name.
03:55:59:602 Gtk Theme parser error: gtk.css:5017:12-15: “mix” is not a valid color name.
03:55:59:602 Gtk Theme parser error: gtk.css:5021:12-15: “mix” is not a valid color name.
03:55:59:603 Gtk Theme parser warning: gtk.css:5222:3-5223:1: Expected ‘;’ at end of block
03:55:59:603 Gtk Theme parser error: gtk.css:5253:3-19: No property named “-gtk-icon-effect”
03:56:08:521 Gs Only 0 apps for recent list, hiding
03:56:12:212 Gs ignoring unknown or empty provided item type: dbus
03:56:12:732 Gs ignoring unknown or empty provided item type: dbus