I view many topics about conflict Spigot and Nolagg. When I try to find why conflict exist, I found that Spigot and Nolagg normally working at one time, but you must disable chunk management by Nolagg. In Nolagg config.yml file set Code (Text): chunks: # Whether Chunks should be loaded on startup enabled: false # The minimum chunk sending rate (chunks/tick) As I understand, spigot already have optimized chunk algorithms and nolagg can't apply his optimization to spigot (not default bukkit) chunk system. Tested on some builds, but I'm think that it's actually for all spigot builds. If you have more information please write here. Maybe this information help someone. P.S.: if found new bugs or features about this situation I will update this post.