Howdy,
I seem to be having the same problem, also using the 64k textures. Here's my log:
https://drive.google.com/file/d/1nEdGyfFsprFqQ4rBx2qiCSn5kPTPBajm/view?usp=sharing
The CloudsManager errors are at the end and seem related to the 64k textures. This is a new install with a bunch of mods, one of which is likely the culprit. Let me know if I can provide any more details.