I’m not quite sure where this is…at the “very top” of each page is a space…is this where you mean? I also do not see where this ? is located. I also cannot see what is putting the space (in height) at the top of every page. So my question would be…when did you first notice this? Because if this recently appeared, it means it’s either something you added, such as content or a plugin that might be causing the issue.
I did load up Encounters in my local test site for your version but do not see that top of page spacing, nor any ? showing…which leads me to think it could be content related or a plugin.