log
When generating a world with trees it, the game crashes from trying to call an abstract method. I put it through K9 and found that the method is AbstractTreeFeature.generate, so something might have changed with generation code. This was done in 1.14.1 with Fabric API 0.3.0 and TBO 1.1.1+beta.

Fixed in unreleased build (and by yourself it seems)

lol why did I close it when I haven't released the update