I’m trying to create a very simple block that moves to a random location using the ai move to function. Does the box have to have a skeletal mesh?
From my initial investigation it would appear it requires both a skeleton and an animation class.
Nope 
The Move To nodes such as Simple Move to Location, Move to Location, AI Move To, etc. don’t require the actor to have a skeletal mesh or an animation class in order to function as expected.
These nodes aren’t special though, the absence of a skeletal mesh or an animation class doesn’t break any type of logic. A skeletal mesh for example, would be needed in a logic where we get a bone name but even in that scenario nothing would be broken, just might not work as expected. So unless you try to get something from them, they don’t matter in terms of functionality.
Hope this helps! 
Hi it appears to work fine now it was due to the cube I was using for a visual aid was colliding with the character. it is now working.