I recently got the errors
22:28:20.703 - Workspace.TrelloAPI:553: unexpected symbol near '='
and
22:28:20.790 - Requested module experienced an error while loading
22:28:20.791 - Script 'Players.Player.PlayerGui.Application.Frame.create.Script', Line 4
22:28:20.792 - Stack End
From the lines
552 - 560:
elseif #args==4 then
local nam,des="",lid,url=args[1],args[2],args[3],args[4]
dat={
name=nam,
desc=""..des,
idList=lid,
urlSource=url,
due=nil
}
and
4:
local ap = require(game.Workspace.TrelloAPI)

3 comments
The second varaible on the definition line, des, is followed by [ ="" ] and then you attempt to continue to define more variables. (dismiss the square brackets, it is only to make the signs more clear)
So, remove the [""] and it should work?
And the equal sign, yes. Or atleast that is the source of the error you are encountering.