Versions (Be specific, do not write "latest"):

• Caelus: caelus-FORGE-1.14.3-0.6
• Forge: forge-1.14.3-27.0.25

Observed Behavior: on second boot(not the first) I got the screen below, and log.

Modpack- https://www.curseforge.com/minecraft/modpacks/the-adventures-of-halk

Log:
https://gist.githubusercontent.com/ProsperCraft/d69e77dc4363868fbb4c3fe2ed9cb01e/raw/23845d4bc78f41906d12a3f54482c94f77bac8c9/gistfile1.txt

Relevant section-
https://gist.github.com/ProsperCraft/b4285949e75706c418844fcb464148d0