that would be your default journal icon! it's not part of the header (by which i mean the class #header), which sits above it and contains only the journal title and subtitle

if you want to change the image to another icon or image (might get a tiny bit complicated because i'd have to figure that out) i can provide the code for that

also, uncheck use layout stylesheet. that's what's hiding your journal title/subtitle. i always forget to put this part in the instructions...