Crash log here:

https://hastebin.com/hiqigageyi.sql

I think Forestry has recently changed how some of its internals are organized, and giving some compat issues for multiple mods going beyond Foresty v5.6.0.201, just wanted to give a heads up in case you wanted to update Sky Resources.

You're on Sky Resources 2.0.23, but there's now 2.1.0 and 2.1.1 that have fixed that crash. Check for the latest version first :D

Ah gotcha, it was still marked as beta instead of a release on Curse, I'll make a note to update, thanks!