Off quotes/Requote could be returned by broker when it is not able to execute the order at the requested price as the market price changed in the meantime, in few cases the broker could be experiencing temporary high latency and it is not able to sync price with their Liquidity Provider. This error happens when your account is configured wiith "Instant execution" mode, with that mode you ask your broker to execute the order sent with a specific price, if in the meantime the symbol price change, the broker send us a Off Quotes or Requote error. Learn more about mt4 execution here : https://www.metatrader4.com/en/trading-platform/help/positions/execution
The Trade Copier try to send several time the orders and if this is still not executed we return the status "Deleted : Off Quotes". In that case, the only solution is to try to place a new order, take care to check discrepencies between masters and slaves accounts.