Issue with making mob follow other mob with commands.

So I'm trying to make it so a kittykit follows a catcoon by spawning them in and using this command.

c_find("critter_kitten",80):DoPeriodicTask(3,function(inst)  inst.components.locomotor:GoToEntity(c_find("catcoon",30)) end)

It works to a extent but the kitty kit only just barely moves to the catcoon. The real problem though is, whenever a friend joins, the game crashes! Please help. This seems real bad.