Players crash on the server in survival mode (first crash log) and i crash when hovering over "harvestcraft:harvestpumpkinitem" Pumpkin (#6513). Survival mode players crash when they try and access their inventory:
https://pastebin.com/uMwuDkzK

I crash when I hover over the Item:
https://pastebin.com/90zvUJpR

Sponge need forge ?

Double-click on spongeforge.jar give Infos.