I'd like to report a random crash. From the crash report, looks like its a compatibility issue with Immersive Weathering.

Crash report: https://pastebin.com/J2HyH2xg

Would also like to report a similar issue I'm having, most likely the same problem. Occurs when loading the terrain of the world

Crash Report: https://mclo.gs/ZDtUuBw

This was caused by a mistake I made in a PR to Moonlight. It's since been fixed in 2.13.47