I keep getting the startup error: Mod File needs language provider javafml:47.3 or above to load. We have found 47.
I opened my latest.log and found this line: [08:52:35] [main/ERROR]: Missing language javafml version [47.3,) wanted by BonsaiTrees3-1.20.1-3.3.0.jar, found 47
I'm playing Minecraft 1.20.1 and I'm using BonsaiTrees3-1.20.1-3.3.0.jar
Is there a way to fix this error?

Already fixed on github. I'll push a new release later today.