I crashed with this report while loading a personal pack (on step 2, I believe):
crash-2017-12-16_10.20.04-client.txt

you're using a really old version of AE2..use RV5-Stable-3

According to the Twitch launcher, I'm using the latest version, are newer ones not available via the launcher yet?

You're using RV5-Beta-10 which is not even available on Twitch Desktop:

I don't know what you're doing...but just update everything...always run the latest before posting bug reports

Oh wait, I'm stupid. I apparently installed Llamagistics along with Energistics by accident. I was confused because everything showed as being up-to-date.