Today I see "Error # The interface is unknown." in our build of Appman 9. Last night there were issues with our ESX hosts, this server wasn't affected by this issue but since then we see this error.

 

I tried removing the monitor, it won't allow me to add it again due to this error.

 

The network settings stayed the same so that's not an issue. Network traffic is passing through the system.

 

Anyone have an idea?