In Chromium, the Stop button and the Reload button are combined. You see the Reload button when Chromium has finished loading a web page.
The button changes into the Stop button when Chromium is loading a web page, to allow you to stop a slow-loading page or the loading of a faulty web page.
There has been error in communication with Booktype server. Not sure right now where is the problem.
You should refresh this page.