Default [Q] Slimkat 4.2.2 "com.android.systemui stopped working"

I am using slimkat 4.4.2 and there's a button to the right of the homebutton that usually opens a popup where i can see other apps that i have opened but after a while it stops working and gives me this error: com.android.systemui has stopped working and after that the UI disappears and restarts itself. Any ideas?