Happens in the latest update, Forge 40.2.0, 1.18.2
java.lang.InvocationTargetException: null
crash-2023-01-30_17.36.57-fml.txt
latest.log

Turns out I pushed a broken forge version by accident. It should be fully working in 2.6.1, which I just released, but feel free to make a new issue if there are more problems I didn't catch.