I see that the image source is showing blank for the blog posts on the homepage. I have assigned this to my developer, and he will take a look. Sorry for the delay as we are upgrading our servers and last few days has been busy days.
Looks like the php-gd library is not installed on your server. You can check with your host on this. The phpinfo() would also tell you if you have it installed. You can search Google for “Edit Image Button missing” and also “How to check GD library is installed” and see if they help.