The icon has disappeared and the categories do not load

[Stefano Dall'Agata]

After the last update the icon has disappeared, in its place the generic with command point appears.
When I look for programs in the categories (Games, Finance or other), they appear after 30/60 seconds, or do not appear.

lsb_release -rd
Description: Ubuntu 20.04 LTS
Release: 20.04

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-software (not installed)
ProcVersionSignature: Ubuntu 5.4.0-28.32-generic 5.4.30
Uname: Linux 5.4.0-28-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: Unity:Unity7:ubuntu
Date: Thu May 7 17:52:36 2020
InstallationDate: Installed on 2020-04-25 (11 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
SourcePackage: gnome-software
UpgradeStatus: No upgrade log present (probably fresh install)

[Stefano Dall'Agata (essedia1960)]

Window screen with Category and programs not appearing.