Почему не ставится ядро?

# snap list
bare 1.0 5 latest/stable canonical✓ base
core22 20240408 1380 latest/stable canonical✓ base
element-desktop 1.11.71 97 latest/stable ken-vandine✪ -
firmware-updater 0+git.5007558 127 latest/stable/… canonical✓ -
gnome-42-2204 0+git.510a601 176 latest/stable/… canonical✓ -
gtk-common-themes 0.1-81-g442e511 1535 latest/stable/… canonical✓ -
kf5-5-113-qt-5-15-11-core22 5.113 1 latest/stable kde✓ -
krita 5.2.2 104 latest/stable krita✓ -
snapd 2.63 21759 latest/stable canonical✓ snapd
thunderbird 128.0esr-3 497 latest/stable/… canonical✓ -
plasma-workspace 4:5.27.11-0ubuntu4.1 768 latest/stable kde✓ -

После попытки установки Плазмы выдает error:

# error snap-package "plasma-workspace" not found