Some system icons were replaced with 'prohibition sign' icon

Question

ISSUE DESCRIPTION:

Some icons are replaced with 'prohibition sign' icons as shown on the screens:

Topbar

Dock

Settings tabs

I guess that a potential reason of this problem is a 'snap-store' update that killed running applications and some other processes. Original icons were replaced from that moment. The issue of 'snap-store' update is described in this thread: Pending Update of Snap Store

ATTEMPTS:

1. Restoring shell theme to 'Yaru-dark' (finally, didn't fix the issue)

Steps:

• Installation and activation of 'User Themes' (https://extensions.gnome.org//extension/19/user-themes/) via Extension Manager
• 'Tweaks' app / 'Appearance' tab / 'Shell' select input set to 'Yaru-dark' screen with related settings

QUESTION:

Is there any way to restore original icons (without system reinstallation)?

DETAILS:

OS: Ubuntu 22.04.1 LTS (64-bit)

Answer 1

Solved. One of Ubuntu Base updates performed about November 16th 2022 restored system icons.