For a long time now I run an AWS Lightsail VPS serving as a wireguard gateway to my home server. Since recently connecting to the Lightsail instance via wireguard is no longer possible.
When I took a look with SSH I got
$> sudo wg-quick up wg0 [#] ip link add wg0 type wireguard RTNETLINK answers: Operation not supported Unable to access interface: Protocol not supported [#] ip link delete dev wg0 Cannot find device "wg0"
To be sure I updated all packages, but the problem still persisted.
The port used by wireguard had not changed and still was accessible according to the network settings of Lightsail.
What change in the Lightsail VPS or network settings could cause an issue like this? It literally just stopped working over night.