Unhandled Exception on Starting the Simulation for ERSYS

I have made a program with a few points, and have a robot on a kuka track (kuka track not moving during process) and I have an error come up when I attempt to run the simulation.

Unhandled exception on starting the simulation.
No component found for KRL machine type “ERSYS” in controller “KRC4 (KR 150 R3100-2)”.

Any ideas as to what may have caused this? How can I fix this?