Cannot Run SSH Command on remote server

I've never had this problem before but in a fairly simple workflow I'm getting the below error logs:

[I] using default

[I] Connecting with key pair (../conf/vco_key)

[I] Unable to execute command: InternalError: Identity file not found ! (Workflow:Run SSH command / Execute SSH Command (item6)#15) (Workflow:Run SSH command / Execute SSH Command (item6)#31)

I'm not telling the command to login using a key so I'm not sure why it continues to do it.  I've never had this issue before, is it a server side problem?