minetest_error

2019-05-14 10:31:08: WARNING[Main]: Undeclared global variable "default" accessed at /home/dan/.minetest/mods/moreores-master/init.lua:26
2019-05-14 10:31:09: ERROR[Main]: ModError: Failed to load and run script from /home/dan/.minetest/mods/moreores-master/init.lua:
2019-05-14 10:31:09: ERROR[Main]: /home/dan/.minetest/mods/moreores-master/init.lua:26: attempt to index global 'default' (a nil value)
2019-05-14 10:31:09: ERROR[Main]: stack traceback:
2019-05-14 10:31:09: ERROR[Main]: 	/home/dan/.minetest/mods/moreores-master/init.lua:26: in main chunk
2019-05-14 10:31:09: ERROR[Main]: Check debug.txt for details.