Without seeing the exact command you’re attempting to run and the exact error messge (copy & paste), it’s a bit hard to say what the issue might be.
I’m not sure why you’re getting an error related to bsub — from what I can tell, bsub is a cluster submission command, and Rosetta, in general, shouldn’t need it. The only thing I can think of is that you’re running a setup script which is intended for use on a cluster with bsub. If you’re not running it on such a cluster, you either need to change the parameters to make the setup script output a different queueing system format, or adjust things to run manually.