FOSS gamedev and creative worlds

Whenever I load a world in BlockForge 2, the game runs for about 2 seconds and then the game crashes.

Here is the error report:

09:49:55: ACTION[ServerThread]: singleplayer joins game. List of players: singleplayer
Font size: 8 17
09:50:00: ERROR[EmergeThread0]: ERROR: An unhandled exception occurred: LuaError: error: ...inetest\bin\..\games\BlockForge2\mods\default/mapgen.lua:479: attempt to call field 'make_cactus' (a nil value)

If you want to see the full report, I have attached it here.
Edit: I tried making a new world, and this time got a new error report:
09:59:56: ERROR[EmergeThread0]: ERROR: An unhandled exception occurred: LuaError: error: ...inetest\bin\..\games\BlockForge2\mods\default/mapgen.lua:446: attempt to call field 'make_papyrus' (a nil value)
09:59:56: ERROR[EmergeThread0]: stack traceback:

Please post in Blockforge's topic.