ManGiou

So I basically gathered some mods and created a local server to play with my brother, but it keeps crashing. I run it using 5 gigs of RAM and from what I gather, the server loads some of the mods but it eventually crashes. Singleplayer runs fine so my first thought was that I included client-side mods, but I cannot seem to find any. I would appreciate if you could help me solve this issue.