SoftEtherVPNを動かしているサーバで、たまに下記のようなエラーに出会う

2019-09-12 10:40:19.796 VPN Connection Setting "hoge1001": The connection has been either disconnected or it failed. Cause: Cannot access the Virtual Network Adapter device driver. Check the Virtual Network Adapter is installed and make sure that it has not been disabled. (code 22)

一度仮想nicを削除して作成し直せば治る

VPN Client> NicDelete nic01
VPN Client> NicCreate nic01
VPN Client> AccountNicSet hoge1001