I just got this error “Could not load a pixbuf from /org/gtk/libgtk/theme/Adwaita/assets/check-symbolic.svg” on my system (MacOS Catalina 10.15.4 ) and i want to give you a short description on how i solve it. We will use brew so here is the command:
brew install librsvgHere is it. Simple! Let me know if it’s work also for you 🙂