Sounds like you installation is corrupted. Try reparing it via the installer. That does not work. Uninstall. Install the game again.
I lost both my Bullroarer and both of my live Lofro clients to corruption issues this year. I ended having to download the Steam installer to get back in game. My Live Lotro installer would not install a working copyu of the game The bullroarer is old. It will not work. At some point I will have to download the latest Bullroarer installer via Pando Medis Booster.
Unless stated otherwise, all content in this post is My Personal Opinion.