No Splitscreen w/ DMS4 + ToxicOS?

[JNABK]

I too have a DMS4 Pro SE/ ToxicOS and Starwars Battlefront 1 & 2. I checked out the Splitscreen option and it is only grayed out if the second controller isnt present, but once i plugged it in, the splitscreen option became available.

So i can only agree with dlanor that the problem is with your controller connection not connecting. Check the analog LED if its lit when its plugged in, as you might just have a bad controller 2 port that needs fixing/cleaning. You can also switch the controllers, just to be sure the controller you put in Controller 2 works ok, since you know the one you used in Controller 1 worked.