Modpack version
1.77

Issue
looking at immersive water wheel in jei will crash you out to launcher

Logs
happened to team mate will have him post crash logs but ya should be easy to test

Interesting, looking forward to seeing that crash report :P

seems to be a conflict with current version of optifine

crash-2020-04-01_15.33.25-client.txt

That it does. His Java is also outdated. This is often caused by Twitch defaulting to an older version than you have available. Follow these steps to update.

• Make sure you have the latest 64-bit Java installed
  https://www.java.com/en/download/manual.jsp Windows Offline (64-bit) is the one you need
• Go to the Twitch Minecraft settings
• Add -version:1.8+ to the Additional Arguments

Java Downloads for All Operating Systems

Java manual download page. Get the latest version of the Java Runtime Environment (JRE) for Windows, Mac, Solaris, and Linux.