gnome-software crashes when clicking updates on Ubuntu 20.04

[Luís Louro]

I installed Ubuntu 20.04 beta. It all went well, and Ubuntu Software was running properly.
Then Ubuntu 20.04 final was out and I saw updates on Ubuntu software. I tried the Updates tab and Ubuntu Software is crashing when I click Updates.

I tried running snap-store from command line. I get this when I click Updates:

18:51:11:0231 Gs automatically prevented from changing kind on system/snap/*/runtime/io.snapcraft.core18-CSO04Jhav2yK0uz97cr0ipQRyqg0qQL6/latest/stable from runtime to unknown!
18:51:19:0935 Gtk gtk_widget_realize: assertion 'widget->priv->anchored || GTK_IS_INVISIBLE (widget)' failed
18:51:19:0935 Gtk gtk_widget_realize: assertion 'widget->priv->anchored || GTK_IS_INVISIBLE (widget)' failed
**
Gtk:ERROR:../gtk/gtkwidget.c:12393:gtk_widget_real_map: assertion failed: (_gtk_widget_get_realized (widget))
Bail out! Gtk:ERROR:../gtk/gtkwidget.c:12393:gtk_widget_real_map: assertion failed: (_gtk_widget_get_realized (widget))
Abortado (núcleo despejado)

lsb_release -rd
Description: Ubuntu 20.04 LTS
Release: 20.04

gnome-software:
  Instalado: (nenhum)
  Candidato: 3.36.0-0ubuntu3
  Tabela de Versão:
     3.36.0-0ubuntu3 500
        500 http://pt.archive.ubuntu.com/ubuntu focal/main amd64 Packages

I expected doing some updates since it shows 7 updates to do.
What happen: gnome-software crashed withou any message.

[Sebastien Bacher (seb128)]

Thank you for your bug report, it does sound like a gtk issue which was resolved around focal release time, could you try if you still get the issue now?

[Matt Chapman (mattchapmannl)]

I am experiencing the same issue and crash message. I ran `sudo snap refresh`, which appears to have resolved the issue.