Custom modpack A fatal error has occured, this connection is terminated [server]

[FishSauce]

[Sen-Mithrarin]

If it works in SP check configs. Must be the same on Client an Server.

If this doesn't help : remove all mods, clear all configs, and re-add the mods one-by-one to identify the faulty one.

If problem still occurs update to 1.7.10 and use latest forge and mod-versions.

[GotoLink]

There was a critical exception handling a packet on channel AetherCraft

Not a Forge issue.