The Nextcloud client shows black squares where there should be icons

[Martin]

I have the Nextcloud 3.1.1-1 package on Ubuntu 21.04, and the main dialog isn't showing icons (see attached picture).

Full version info:

martin@magni ~ $ nextcloud --version
Nextcloud version 3.1.1-1
Using Qt 5.15.2, built against Qt 5.15.2
Using Qt platform plugin 'xcb'
Using 'OpenSSL 1.1.1f 31 Mar 2020'
Running on Ubuntu Hirsute Hippo (development branch), x86_64

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: nextcloud-desktop 3.1.1-1
ProcVersionSignature: Ubuntu 5.10.0-14.15-generic 5.10.11
Uname: Linux 5.10.0-14-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu59
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Mon Mar 1 15:19:52 2021
InstallationDate: Installed on 2019-09-14 (533 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
SourcePackage: nextcloud-desktop
UpgradeStatus: Upgraded to hirsute on 2021-01-07 (52 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Sergey Zolotarev (szx)]

I have the same problem both with the official Ubuntu 22.04 package and with the one from Nextcloud Development PPA (3.10.0).