Hmm, I've re-installed solus-sc and solus-sc-icons
When launching I get:
8 CPUs detected, restricting to 2 threads
(solus-sc:9760): As-WARNING **: 11:30:02.158: com.github.cybre.budgie-haste-applet was of type addon but had no extends
(solus-sc:9760): As-WARNING **: 11:30:02.158: com.github.cybre.budgie-screenshot-applet was of type addon but had no extends
(solus-sc:9760): As-WARNING **: 11:30:02.158: com.github.danielpinto8zz6.budgie-calendar-applet.appdata.xml was of type addon but had no extends
(solus-sc:9760): As-WARNING **: 11:30:02.168: com.github.cybre.budgie-haste-applet was of type addon but had no extends
(solus-sc:9760): As-WARNING **: 11:30:02.168: com.github.cybre.budgie-screenshot-applet was of type addon but had no extends
(solus-sc:9760): As-WARNING **: 11:30:02.168: com.github.danielpinto8zz6.budgie-calendar-applet.appdata.xml was of type addon but had no extends
gtk-icon-theme-error-quark: Icon 'application-x-addon' not present in theme breeze-dark (0)
(solus-sc:9760): Gtk-WARNING **: 11:30:02.223: Theme directory 32x32/apps48x48/apps of theme solus-sc has no size field
Last line is obviously the only relevant one, any GTK gurus got ideas?
Also checked, no broken packages.