Board Thread:LotR Mod Technical Support/@comment-67.175.136.139-20160723202301/@comment-26410366-20160724135335

First remove all your other mods. If it still crashes, reinstall the mod. Then reinstall forge if it still happens.

Those are the basic steps that fix most problems. Were you doing anything when it crashed, or did it crash before the title screen? If you were in world, then you come here. Otherwise it is problems with other mods or a corrupted download.