Error Trade Does Not Exist

The Trade does not exist are not a real issue, in fact, as you copy SL and TP from master, as soon as the master's TP or SL are triggered it send an order to the Slave, but in the meantime the SL and TP that are already copied on the Slave account are triggered too, so one of these two orders is executed and the second one cannot be executed as the Trade does not exist as it is already closed by first order triggered.