Comment 20 for bug 1933128

In my case I was able to solve it yesterday with (inside lxd container):

sudo snap refresh
sudo snap remove etcd
sudo snap install etcd
sudo reboot

Same issue I had with kube-apiserver (in my case we are using k8s 1.21):

snap refresh
sudo snap remove kubectl
sudo snap install kubectl --channel=1.21/stable --classic
snap remove kube-apiserver
sudo snap install kube-apiserver --channel=1.21/stable
sudo reboot

Apparently there were fixed snaps/core.