Startup Issue with Minecraft - Wont start up at all

[ThePotatoKing]

Make sure you have the correct Java Version selected for the version of MC FTB Ultimate uses.
See this guide here for more info (specifically section 2 onward)

Setting Up A Modded Java Minecraft Server

Preamble Minecraft is a bit notorious for being difficult to mod, given there’s oodles of different modloaders and versions to work with, there’s edge cases galore. If you’re new to the Minecraft modding scene and you’d like to know more about each modding platform and how they differ, check out this post here. 0. Create a new Minecraft Java Instance in AMP Easy as that, press the Create Instance button, then select Minecraft Java Edition from the drop-down. Feel free to use an existing instan…