I have the same problem. No thumbnails, no images appearing on the posts.
Oh you know what, I just NOW solved my own problem. I do not know if this solution will last, but….
I went to >>> Dashboard >>> Settings >>> Media >>> Uploading Files >>> Full URL path to Files. I filled that one up even if it said it is optional to do so. E.g. the DEFAULT is /home/content/h/a/i/haigbrown/html/haigbrown/wp-content/uploads
but I also filled up Full URL path to Files, so I placed
http://www.haigbrown.com/wp-content/uploads/
Hope the same works for you.