What does this mean? I've tried to upload a picture I don't know how many times, only to get this message. I've cropped it and cropped it, but I'm unsure what it needs cropped TO. The original can be found here:
By default, MediaWiki has a maximum image dimension in pixels to allow before thumbnail generation breaks and the file can't be uploaded. I believe the current maximum dimensions are 3500×3500. The full sized image on that link is 7720 X 4409. I'd recommend resizing the image to 25%, which should still upload a fairly generously large image while getting under that thumbnail limit.