I was watching a tutorial by challacade and he said to use this tool but the code he provided doesn't work. This is the error I get

Error

libraries/sti/init.lua:94: STI does not support external Tilesets. You need to embed all Tilesets.

Traceback

[love "callbacks.lua"]:228: in function 'handler' [C]: in function 'assert' libraries/sti/init.lua:94: in function 'init' libraries/sti/init.lua:49: in function 'sti' main.lua:10: in function 'load' [love "callbacks.lua"]:136: in function <[love "callbacks.lua"]:135> [C]: in function 'xpcall' [C]: in function 'xpcall'