Command not working when in Command Block..

So this command /execute at @e[name=outline_target] facing entity @a eyes run function murderdrones:null_less_big_outline works when I use it in the chat, but when I put it in a repeating command block, it stops working..
The function basically summons a giant circle at the armor stand that has the name outline_solver 
Sorry if this is actually a very easy fix, unfortunately I am an idiot when it comes to Commands..