FOSS gamedev and creative worlds

This always tell whenever I use it:
17:25:12: ERROR[main]: ServerError: LuaError: error: attempt to index a nil value
17:25:12: ERROR[main]: stack traceback:

Also heres a picture:

dont even use it....its very very laggy

If u have a problem with a specific mod, you need to find the topic for that mod ad post your issue there.