Will are 5th be able to participate?

we registered for the weekend cup , but we didn’t notice that our new 5th wasn’t added to the our team on sstk, though he is on our active lineup , his name isn’t visible under the name of our team under the registered teams , I wanted to ask will he be able to play and if not can you help us out with it??

Due to the nature of the weekend cup, it is not possible for players to play after registering. Only way would be to unregister and register again.