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