Game crashes when I tried to destroy crops.
Crash Report: https://pastebin.com/raw/Z82S2dUw

Also, Agri has also some issues with Dynamic Surroundings Mod
Crash Report: https://pastebin.com/raw/snPmv4q8

Looks like a sound problem.

Thanks for the info, cant try it anymore because i just removed AgriCraft from my modpack. I guess I just wait until its out of "Alpha" :P

I had a similar problem. There is an option in the config file that probably needs to be changed. It disables sound from agricraft, but sounds from breaking blocks cannot be cancelled. Thus, when you try to break crop sticks, the game crashes.

B:"Disable sounds"=false

Should be around line 8 or so of the config.

Thanks for the investigation @sipes42! It is very helpful and time-saving. I actually submitted a PR to MinecraftForge because that error message was so dang vague (yeah, I know we tried to cancel a un-cancelable event! But which one!?).