0.10.0+1.20.1 causes crash on world load

[JMackey1]

Been using this mod on the same world for a while now. Upgraded to 0.10.0 today and now my world won't load. Downgrading to 0.9.32 fixes the issue.

I've attached the crashlog.
crash-2023-10-03_18.23.55-client.txt

[ZsoltMolnarrr]

You need to update Simply Skills mod.