Board Thread:Bug Reports/@comment-99.32.20.192-20160418222240/@comment-26078371-20160418234146

LOTRGuy wrote: 1. It is impossible that this mod causes other mods to not work.

2. After the servers changed out versions, they usually clear worlds and start fresh. They then have to add mods back in.

ThaurdirTheWraithNecromancer List of Suggestions  23:13, April 18, 2016 (UTC) Mods =/= plugins

Mods are generally run through forge (such as the lotr mod), while plugins are used through Bukkit. Following beta 28, bukkit plugins do not work on servers anymore. Since nothing besides the mod changed, it's fair to assume that something Mevans did is responsible for them not working anymore.