Insert Related Lists Error SharePoint 2013

I am trying to move my site from one place to another, but since it wasn't going, I am just manually recreating the site structure.

In the display form for one of my lists, I used the "Insert Related Lists" feature to add a related list webpart. It appeared to work, but when I actually went to display an item, it threw an "unexpected error".

I understand that this is pretty much the most nondescript error possible, but I genuinely don't have anything else since I'm using SharePoint Online with Office 365 and can't check the ULS error logs.

I was just hoping that maybe someone else had come across this before and already knew a solution? Any help greatly appreciated...