View As Array not working for Unreal C++ project

I'm currently running Rider 2022.2.1 and using it for an Unreal Engine project. While debugging, I'm trying to use the "View As Array..." in the right-click menu of the debugger's variable watch window, but I'm not having any success with it. It gives a field where I can input the number of elements in the array, but it always gives this obscure error:

I know for a fact that this array has 9 elements in it, and I can access each individual element using square brackets like you'd expect, but what I really need is a way to view all elements in the array at the same time so I can quickly look for problems. It seems like this feature should do just that, but it never works. What does this error mean? How do I get this to do anything? In Visual Studio you would do this by appending a comma and the number of elements in the array. Is this supposed to do the same thing or is there something else that can do it?