Bug Report

[ Crashes to MC launcher with the message:
The game crashed whilst mouseclicked event handler
Error: java.lang.ClassCastException: net.minecraft.util.text.StringTextComponent cannot be cast to net.minecraft.util.text.TranslationTextComponent
Exit Code: -1

Terra Devs: This is an issue with Biomes O Plenty. They are (incorrectly) assuming that the generator type's TextComponent is a TranslationTextComponent, when ours are StringTextComponents. This can be fixed on their end with a simple instanceof check. ]

How can the crash be reproduced?

[ Clicking "Create New World" from the singleplayer menu with Biomes O' Plenty and Terra in mods folder ]

Crash Report and Logs

[ crash-2021-05-26_18.50.57-client.txt ]

Mod Version

[ 1.16.5-13.1.0.465 ]

This same issue was also posted on the Terra issue tracker.
PolyhedralDev/Terra#202
Their response was the following:

This is an issue with Biomes O Plenty. They are (incorrectly) assuming that the generator type's "TextComponent" is a "TranslationTextComponent", when ours are "StringTextComponent"s. This can be fixed on their end with a simple instanceof check.

Hopefully the BOP team can implement this fix.