Error Deleted: Account is OFF/Open Only/Close Only Mode

In the Copy Settings you can configure the copier status for a specific slave it will define if the copy trading is currently active or not, you can choose to copy all trades (ON), or copy only trades that open (Open Only) or close a position (Close Only), or to deactivate the copy (OFF). 

In such case you could receive a Deleted: Account is OFF/OpenOnly/CloseOnly order status, if your master try to place an order on such slave on which you have defined a specific configuration.

Learn more on Copier Status: here.