that ivy guy

That seems to absolutely be the case. For some reason I was under the assumption that I needed it to log in. Looks like they haven't fully assembled the modpack yet. Thanks!

Crash to launcher when attempting to open the vanilla recipe book. I can't really discern which mod would be causing this. At first glance it appears to be perhaps even a completely vanilla bug. This is on a server with a custom, small modpack. While the logs indicate the error with "jacaranda planks" every time, I believe this is only the case because these planks occupy the smallest block ID beyond vanilla ones (first to cause the crash). Oddly enough, the crash only happens while logged into a multiplayer server. It is perfectly safe to open the recipe book in single player. I tried without the resource packs (Sphax) and no change. I tried using the latest forge release instead of the recommended—no change. Stranger still, apparently nobody else with this modpack is experiencing the same issue. Also, yeah, I have not reached out to InvTweaks or Quark yet, because quite frankly I just doubt that it would pertain to them, but I'm also completely ignorant in how this works. Crash Report: Latest log: