Board Thread:LotR Mod Technical Support/@comment-28687263-20170302212026/@comment-25101089-20170303170513

I searched around for that crash and found this: link

The crash isn't related to the 'this is a bug in the lord of the rings mod'. That is something separate, but not an error - it's because the LOTR mod replaces some vanilla blocks, and Forge sees this as registering a modded block incorrectly. I've never heard of any problems caused by that, so you need not worry.