Me and a mate have found when playing on the FTB revelations pack when you have the terminal in the number 2 slot and press shift + 2 to get the @ symbol it crashes the server. Its probably just putting the terminal inside itself.

revelations is using an outdated version, can you please try this version: https://minecraft.curseforge.com/projects/wireless-crafting-terminal/files/2552069

Ah yep that did it thanks.