Struggling to install snap

[marpet]

I think it wasn’t correctly installed. The installation process should have asked you some questions and I don’t see them.
I think the post below can help you:

Installation problem in Linux

Hello Everyone, I had a similar issue after installing SNAP 7.0 (downloaded on 2019/Nov/19) using the above procedure described by KenanV. The messages when starting snap in the terminal was: "Gtk-Message: 13:17:49.557:Failed to load module “canberra-gtk-module” But after installing the module with: sudo apt install libcanberra-gtk-module libcanberra-gtk3-module And starting snap again, it all worked fine. I use Ubuntu 18.04.2. (Linux 5.0.0-32-generic with x86_64 GNU/Linux OS)