plasma-discover crashed with SIGSEGV in g_slist_find()

Невозможно войти в Discover и в трее постоянно висит значок Обновления: доступны обновления.

ProblemType: Crash
DistroRelease: Ubuntu 21.04
Package: plasma-discover 5.20.90-0ubuntu1
Uname: Linux 5.11.0-051100rc5-generic x86_64
ApportVersion: 2.20.11-0ubuntu57
Architecture: amd64
CasperMD5CheckResult: unknown
CrashCounter: 1
CurrentDesktop: KDE
Date: Fri Feb 12 01:38:07 2021
ExecutablePath: /usr/bin/plasma-discover
InstallationDate: Installed on 2020-12-12 (61 days ago)
InstallationMedia: Kubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
ProcCmdline: /usr/bin/plasma-discover --mode update
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
 LANGUAGE=ru:en_US
Signal: 11
SourcePackage: plasma-discover
StacktraceTop:
 g_slist_find () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /lib/x86_64-linux-gnu/libgobject-2.0.so.0
 ?? () from /lib/x86_64-linux-gnu/libgobject-2.0.so.0
 ?? () from /lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_object_new_valist () from /lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: plasma-discover crashed with SIGSEGV in g_slist_find()
UpgradeStatus: Upgraded to hirsute on 2020-12-13 (60 days ago)
UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
XsessionErrors:
 (process:371971): GLib-CRITICAL **: 08:00:09.807: g_atomic_ref_count_dec: assertion 'g_atomic_int_get (arc) > 0' failed
 (process:371971): GLib-CRITICAL **: 08:00:09.818: g_atomic_ref_count_dec: assertion 'g_atomic_int_get (arc) > 0' failed
 (process:1549): GLib-CRITICAL **: 09:09:37.640: g_atomic_ref_count_dec: assertion 'g_atomic_int_get (arc) > 0' failed
 (process:1549): GLib-CRITICAL **: 09:09:37.686: g_atomic_ref_count_dec: assertion 'g_atomic_int_get (arc) > 0' failed
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